{"source":"polymarket","id":"536692","ticker":"highest-temperature-in-chicago-on-may-31-2026","slug":"highest-temperature-in-chicago-on-may-31-2026","title":"Highest temperature in Chicago on May 31?","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","active":true,"closed":false,"start_date":"2026-05-29T04:25:31.563360Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":14128.061546,"volume_24hr":3168.596678,"volume_24h_change":null,"normalized_vol_24hr":20.65677261352539,"normalized_volume":20.731185913085938,"liquidity":86184.09234,"open_interest":6280.118227999999,"categories":["Climate and Weather"],"tags":[{"id":"84","slug":"weather","label":"Weather"},{"id":"101757","slug":"recurring","label":"Recurring"},{"id":"102169","slug":"hide-from-new","label":"Hide From New"},{"id":"100770","slug":"chicago","label":"Chicago"},{"id":"103040","slug":"daily-temperature","label":"Daily Temperature"},{"id":"105111","slug":"rewards-automation-100-2","label":"Rewards Automation 100 4.5 50 (2)"},{"id":"104596","slug":"highest-temperature","label":"Highest temperature"}],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"66°F or higher","top_outcome_probability":0.9975,"top_outcome_prob_24h_change":0.0030000000000000027,"top_outcome_volume_24h_change":-3143.3096839999994,"updated_at":"2026-05-30T21:27:52.004475Z","fetched_at":"2026-05-30T21:27:52.004475Z","added_at":"2026-05-29T04:23:37.912428Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026","chart_24h":[10959.464868,11004.464868,11004.464868,11016.574868,11131.569533999998,11392.325283999999,11410.285284,11410.285284,11546.618616,11555.403616,9952.451915999998,9826.841916999998,10095.966916999998,10472.07627,10467.07627,9966.026269999998,10346.471024999999,10179.818758999998,10068.711597999998,3367.001112,3291.198112,3818.329444,3848.329444,3854.415444,3856.8314440000004,3490.4387810000003,3510.038085,3411.441835,3451.874167,3429.833057,3103.953057,3159.103078,3163.183078,3125.076678,3168.596678],"markets":[{"source":"polymarket","id":"2383737","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-66forhigher","question":"Will the highest temperature in Chicago be 66°F or higher on May 31?","group_item_title":"66°F or higher","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.9975,0.0025],"probability":0.9975,"spread":0.003,"active":true,"closed":false,"start_date":"2026-05-29T04:12:07.765654Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":4175.1830119999995,"volume_24hr":515.936664,"prob_24h_change":0.0030000000000000027,"volume_24h_change":-3143.3096839999994,"normalized_vol_24hr":12.890741348266602,"normalized_volume":20.393123626708984,"liquidity":2002.58588,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:28:34.166692Z","fetched_at":"2026-05-30T20:57:59.774614Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-66forhigher","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.9945,0.996,0.996,0.996,0.9965,0.996,0.995,0.996,0.995,0.995,0.995,0.995,0.9945,0.995,0.995,0.996,0.995,0.994,0.994,0.996,0.996,0.996,0.9955,0.996,0.9965,0.9965,0.9975,0.9975,0.9975,0.9975,0.9975]},{"source":"polymarket","id":"2383735","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-62-63f","question":"Will the highest temperature in Chicago be between 62-63°F on May 31?","group_item_title":"62-63°F","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0025,0.9975],"probability":0.0025,"spread":0.003,"active":true,"closed":false,"start_date":"2026-05-29T04:11:59.335503Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":1242.7691860000002,"volume_24hr":469.49818600000003,"prob_24h_change":-0.0005,"volume_24h_change":-318.7728139999999,"normalized_vol_24hr":12.505255699157715,"normalized_volume":14.897995948791504,"liquidity":7837.96726,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:13:44.499177Z","fetched_at":"2026-05-30T21:13:04.332850Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-62-63f","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.003,0.003,0.0005,0.003,0.003,0.003,0.003,0.004,0.0035,0.0035,0.0025,0.0035,0.0035,0.003,0.0025,0.0025,0.0025,0.0025,0.0025,0.002,0.002,0.002,0.0025]},{"source":"polymarket","id":"2383736","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-64-65f","question":"Will the highest temperature in Chicago be between 64-65°F on May 31?","group_item_title":"64-65°F","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.002,0.998],"probability":0.002,"spread":0.002,"active":true,"closed":false,"start_date":"2026-05-29T04:12:04.402983Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":1920.1517130000004,"volume_24hr":1027.594769,"prob_24h_change":-0.0024999999999999996,"volume_24h_change":120.037825,"normalized_vol_24hr":15.886151313781738,"normalized_volume":16.77142333984375,"liquidity":6035.11023,"categories":["Climate and Weather"],"updated_at":"2026-05-30T20:44:20.992878Z","fetched_at":"2026-05-30T20:12:55.083588Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-64-65f","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.0045,0.005,0.006,0.005,0.0055,0.0045,0.0045,0.005,0.005,0.0045,0.0045,0.003,0.003,0.003,0.0045,0.0045,0.0045,0.0035,0.003,0.0035,0.0035,0.004,0.004,0.0035,0.002,0.0025,0.002,0.002,0.002]},{"source":"polymarket","id":"2383727","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-47forbelow","question":"Will the highest temperature in Chicago be 47°F or below on May 31?","group_item_title":"47°F or below","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0015,0.9985],"probability":0.0015,"spread":0.003,"active":true,"closed":false,"start_date":"2026-05-29T04:11:19.374453Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":842.713304,"volume_24hr":396.713304,"prob_24h_change":0.0005,"volume_24h_change":-44.28669599999995,"normalized_vol_24hr":11.83154296875,"normalized_volume":13.319442749023438,"liquidity":8451.59504,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:13:44.499177Z","fetched_at":"2026-05-30T21:13:04.332850Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-47forbelow","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.001,0.001,0.001,0.0015,0.0015,0.002,0.002,0.002,0.002,0.002,0.002,0.0015,0.002,0.0015,0.0015,0.0005,0.0015]},{"source":"polymarket","id":"2383728","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-48-49f","question":"Will the highest temperature in Chicago be between 48-49°F on May 31?","group_item_title":"48-49°F","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0015,0.9985],"probability":0.0015,"spread":0.003,"active":true,"closed":false,"start_date":"2026-05-29T04:11:22.289005Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":1222.675519,"volume_24hr":5.0,"prob_24h_change":-0.0005,"volume_24h_change":-1212.675519,"normalized_vol_24hr":1.0601476430892944,"normalized_volume":14.829970359802246,"liquidity":8097.36296,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:13:44.499177Z","fetched_at":"2026-05-30T21:13:04.332850Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-48-49f","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.002,0.002,0.002,0.002,0.002,0.002,0.002,0.002,0.0015,0.0015,0.0005,0.0015,0.002,0.0015,0.0015,0.0005,0.0015,0.0005,0.0015]},{"source":"polymarket","id":"2383731","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-54-55f","question":"Will the highest temperature in Chicago be between 54-55°F on May 31?","group_item_title":"54-55°F","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0015,0.9985],"probability":0.0015,"spread":0.003,"active":true,"closed":false,"start_date":"2026-05-29T04:11:39.230182Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":1357.112019,"volume_24hr":372.127,"prob_24h_change":0.001,"volume_24h_change":-607.858019,"normalized_vol_24hr":11.580620765686035,"normalized_volume":15.268012046813965,"liquidity":9321.60633,"categories":["Climate and Weather"],"updated_at":"2026-05-30T20:58:48.794736Z","fetched_at":"2026-05-30T20:57:59.774614Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-54-55f","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.0005,0.0005,0.0005,0.0005,0.0005,0.0005,0.0025,0.0025,0.001,0.001,0.001,0.002,0.002,0.002,0.002,0.002,0.002,0.002,0.0015]},{"source":"polymarket","id":"2383734","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-60-61f","question":"Will the highest temperature in Chicago be between 60-61°F on May 31?","group_item_title":"60-61°F","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.001,0.999],"probability":0.001,"spread":0.002,"active":true,"closed":false,"start_date":"2026-05-29T04:11:56.493216Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":682.7767550000001,"volume_24hr":351.77675500000004,"prob_24h_change":0.0,"volume_24h_change":25.776755000000037,"normalized_vol_24hr":11.362311363220215,"normalized_volume":12.501422882080078,"liquidity":9186.10798,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:13:44.499177Z","fetched_at":"2026-05-30T21:13:04.332850Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-60-61f","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.001,0.001,0.001,0.001,0.003,0.0035,0.0025,0.0025,0.0025,0.0025,0.003,0.002,0.002,0.002,0.0025,0.001,0.0005,0.001]},{"source":"polymarket","id":"2383733","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-58-59f","question":"Will the highest temperature in Chicago be between 58-59°F on May 31?","group_item_title":"58-59°F","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0005,0.9995],"probability":0.0005,"spread":0.001,"active":true,"closed":false,"start_date":"2026-05-29T04:11:49.222623Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":360.95000000000005,"volume_24hr":29.95,"prob_24h_change":-0.0005,"volume_24h_change":-296.05,"normalized_vol_24hr":3.8904144763946533,"normalized_volume":10.183588981628418,"liquidity":9362.37504,"categories":["Climate and Weather"],"updated_at":"2026-05-30T16:49:50.203397Z","fetched_at":"2026-05-30T10:17:26.630841Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-58-59f","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.001,0.001,0.002,0.001,0.0005,0.0005,0.0005,0.0005]},{"source":"polymarket","id":"2383729","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-50-51f","question":"Will the highest temperature in Chicago be between 50-51°F on May 31?","group_item_title":"50-51°F","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0015,0.9985],"probability":0.0015,"spread":0.003,"active":true,"closed":false,"start_date":"2026-05-29T04:11:27.446328Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":996.3650190000001,"volume_24hr":0.0,"prob_24h_change":-0.0005,"volume_24h_change":-996.3650190000001,"normalized_vol_24hr":null,"normalized_volume":13.989115715026855,"liquidity":8562.00643,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:13:44.499177Z","fetched_at":"2026-05-30T21:13:04.332850Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-50-51f","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.002,0.002,0.002,0.002,0.002,0.002,0.002,0.0015,0.0015,0.0005,0.0005,0.0015,0.0015,0.0015,0.0015,0.0005,0.0015]},{"source":"polymarket","id":"2383730","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-52-53f","question":"Will the highest temperature in Chicago be between 52-53°F on May 31?","group_item_title":"52-53°F","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0015,0.9985],"probability":0.0015,"spread":0.003,"active":true,"closed":false,"start_date":"2026-05-29T04:11:34.411500Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":996.3650190000001,"volume_24hr":0.0,"prob_24h_change":-0.0005,"volume_24h_change":-996.3650190000001,"normalized_vol_24hr":null,"normalized_volume":13.989115715026855,"liquidity":8488.39995,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:13:44.499177Z","fetched_at":"2026-05-30T21:13:04.332850Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-52-53f","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.002,0.002,0.002,0.002,0.002,0.002,0.002,0.0015,0.0015,0.0005,0.0005,0.0015,0.0015,0.0015,0.0015,0.0005,0.0015]},{"source":"polymarket","id":"2383732","event_id":"536692","slug":"highest-temperature-in-chicago-on-may-31-2026-56-57f","question":"Will the highest temperature in Chicago be between 56-57°F on May 31?","group_item_title":"56-57°F","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 31 May '26.\n\nThe resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.\n\nTo toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.\n\nThis market can not resolve until the first data point for the following date has been published on the resolution source.\n\nThe resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.\n\nRevisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/highest-temperature-in-chicago-on-december-5-IoEGq9msnWg6.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0005,0.9995],"probability":0.0005,"spread":0.001,"active":true,"closed":false,"start_date":"2026-05-29T04:11:48.195221Z","end_date":"2026-05-31T12:00:00Z","closed_time":null,"volume":331.00000000000006,"volume_24hr":0.0,"prob_24h_change":-0.0005,"volume_24h_change":-326.0,"normalized_vol_24hr":null,"normalized_volume":9.887188911437988,"liquidity":9599.50658,"categories":["Climate and Weather"],"updated_at":"2026-05-30T16:49:50.203397Z","fetched_at":"2026-05-30T10:17:26.630841Z","added_at":"2026-05-29T04:23:38.317412Z","url":"https://polymarket.com/event/highest-temperature-in-chicago-on-may-31-2026/highest-temperature-in-chicago-on-may-31-2026-56-57f","event_title":"Highest temperature in Chicago on May 31?","chart_24h":[0.001,0.001,0.001,0.0015,0.0015,0.0005,0.0005,0.0005,0.0005]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/536692","as_of":"2026-05-30T21:33:15.605228Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"Highest temperature in Chicago on May 31?\" — top market at 0% probability across 11 outcomes","source_url":null}}