{"source":"kalshi","id":"KXHIGHCHI-26MAY31","ticker":"KXHIGHCHI-26MAY31","slug":"KXHIGHCHI-26MAY31","title":"Highest temperature in Chicago on May 31, 2026?","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-05-30T14:00:00Z","end_date":"2026-06-07T14:00:00Z","closed_time":null,"volume":11024.06,"volume_24hr":11022.06,"volume_24h_change":null,"normalized_vol_24hr":28.3249454498291,"normalized_volume":23.356712341308594,"liquidity":null,"open_interest":6346.98,"categories":["Climate and Weather"],"tags":[],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"74° to 75°","top_outcome_probability":0.37,"top_outcome_prob_24h_change":0.15,"top_outcome_volume_24h_change":1188.58,"updated_at":"2026-05-31T01:09:56.384445Z","fetched_at":"2026-05-31T01:09:56.384445Z","added_at":"2026-05-30T14:08:36.607957Z","url":"https://kalshi.com/markets/kxhighchi/highest-temperature-in-chicago-on-may-31-2026/kxhighchi-26may31","chart_24h":[86.0,751.62,1125.29,3940.51,4042.52,4533.24,4924.37,5133.14,5507.57,5821.26,7077.51,8074.29,8953.73,9263.89,9419.95,10765.4],"markets":[{"source":"kalshi","id":"KXHIGHCHI-26MAY31-B74.5","event_id":"KXHIGHCHI-26MAY31","slug":"KXHIGHCHI-26MAY31-B74.5","question":"Will the high temp in Chicago be 74-75° on May 31, 2026?","group_item_title":"74° to 75°","description":"If the highest temperature recorded at Chicago Midway, IL for May 31, 2026, is between 74-75° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.37,0.63],"probability":0.37,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-05-30T14:00:00Z","end_date":"2026-06-07T14:00:00Z","closed_time":"2026-06-01T05:59:00Z","volume":1189.58,"volume_24hr":1188.58,"prob_24h_change":0.15,"volume_24h_change":1188.58,"normalized_vol_24hr":17.193981170654297,"normalized_volume":16.274648666381836,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-31T01:10:47.831847Z","fetched_at":"2026-05-31T01:09:56.530789Z","added_at":"2026-05-30T14:08:36.729359Z","url":"https://kalshi.com/markets/kxhighchi/highest-temperature-in-chicago-on-may-31-2026/kxhighchi-26may31","event_title":"Highest temperature in Chicago on May 31, 2026?","chart_24h":[0.22,0.19,0.18,0.19,0.2,0.23,0.25,0.26,0.26,0.3,0.36,0.35,0.35,0.35,0.35,0.35]},{"source":"kalshi","id":"KXHIGHCHI-26MAY31-B76.5","event_id":"KXHIGHCHI-26MAY31","slug":"KXHIGHCHI-26MAY31-B76.5","question":"Will the high temp in Chicago be 76-77° on May 31, 2026?","group_item_title":"76° to 77°","description":"If the highest temperature recorded at Chicago Midway, IL for May 31, 2026, is between 76-77° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.33,0.6699999999999999],"probability":0.33,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-05-30T14:00:00Z","end_date":"2026-06-07T14:00:00Z","closed_time":"2026-06-01T05:59:00Z","volume":3294.66,"volume_24hr":3293.66,"prob_24h_change":-0.02999999999999997,"volume_24h_change":3291.66,"normalized_vol_24hr":22.49675750732422,"normalized_volume":21.290435791015625,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-31T01:10:47.831847Z","fetched_at":"2026-05-31T01:09:56.530789Z","added_at":"2026-05-30T14:08:36.729359Z","url":"https://kalshi.com/markets/kxhighchi/highest-temperature-in-chicago-on-may-31-2026/kxhighchi-26may31","event_title":"Highest temperature in Chicago on May 31, 2026?","chart_24h":[0.36,0.34,0.34,0.42,0.38,0.39,0.4,0.41,0.41,0.39,0.36,0.41,0.38,0.38,0.37,0.35]},{"source":"kalshi","id":"KXHIGHCHI-26MAY31-T74","event_id":"KXHIGHCHI-26MAY31","slug":"KXHIGHCHI-26MAY31-T74","question":"Will the high temp in Chicago be <74° on May 31, 2026?","group_item_title":"73° or below","description":"If the highest temperature recorded at Chicago Midway, IL for May 31, 2026, is less than 74° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.22,0.78],"probability":0.22,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-05-30T14:00:00Z","end_date":"2026-06-07T14:00:00Z","closed_time":"2026-06-01T05:59:00Z","volume":2685.71,"volume_24hr":2685.71,"prob_24h_change":0.0,"volume_24h_change":2621.71,"normalized_vol_24hr":21.37794303894043,"normalized_volume":20.230098724365234,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-31T01:10:47.831847Z","fetched_at":"2026-05-31T01:09:56.530789Z","added_at":"2026-05-30T14:08:36.729359Z","url":"https://kalshi.com/markets/kxhighchi/highest-temperature-in-chicago-on-may-31-2026/kxhighchi-26may31","event_title":"Highest temperature in Chicago on May 31, 2026?","chart_24h":[0.22,0.08,0.07,0.05,0.06,0.06,0.06,0.04,0.06,0.16,0.17,0.16,0.17,0.18,0.19,0.18]},{"source":"kalshi","id":"KXHIGHCHI-26MAY31-B78.5","event_id":"KXHIGHCHI-26MAY31","slug":"KXHIGHCHI-26MAY31-B78.5","question":"Will the high temp in Chicago be 78-79° on May 31, 2026?","group_item_title":"78° to 79°","description":"If the highest temperature recorded at Chicago Midway, IL for May 31, 2026, is between 78-79° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.09,0.91],"probability":0.09,"spread":0.009999999999999995,"active":true,"closed":false,"start_date":"2026-05-30T14:00:00Z","end_date":"2026-06-07T14:00:00Z","closed_time":"2026-06-01T05:59:00Z","volume":645.74,"volume_24hr":645.74,"prob_24h_change":-0.15,"volume_24h_change":644.74,"normalized_vol_24hr":14.361943244934082,"normalized_volume":13.590807914733887,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-31T01:09:56.530789Z","fetched_at":"2026-05-31T01:09:56.530789Z","added_at":"2026-05-30T14:08:36.729359Z","url":"https://kalshi.com/markets/kxhighchi/highest-temperature-in-chicago-on-may-31-2026/kxhighchi-26may31","event_title":"Highest temperature in Chicago on May 31, 2026?","chart_24h":[0.24,0.24,0.24,0.24,0.2,0.19,0.19,0.2,0.2,0.12,0.14,0.1,0.09,0.09,0.09,0.09]},{"source":"kalshi","id":"KXHIGHCHI-26MAY31-B80.5","event_id":"KXHIGHCHI-26MAY31","slug":"KXHIGHCHI-26MAY31-B80.5","question":"Will the high temp in Chicago be 80-81° on May 31, 2026?","group_item_title":"80° to 81°","description":"If the highest temperature recorded at Chicago Midway, IL for May 31, 2026, is between 80-81° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.03,0.97],"probability":0.03,"spread":0.009999999999999998,"active":true,"closed":false,"start_date":"2026-05-30T14:00:00Z","end_date":"2026-06-07T14:00:00Z","closed_time":"2026-06-01T05:59:00Z","volume":355.37,"volume_24hr":355.37,"prob_24h_change":-0.11000000000000001,"volume_24h_change":354.37,"normalized_vol_24hr":11.838665008544922,"normalized_volume":11.203012466430664,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-31T01:10:47.831847Z","fetched_at":"2026-05-31T01:09:56.530789Z","added_at":"2026-05-30T14:08:36.729359Z","url":"https://kalshi.com/markets/kxhighchi/highest-temperature-in-chicago-on-may-31-2026/kxhighchi-26may31","event_title":"Highest temperature in Chicago on May 31, 2026?","chart_24h":[0.14,0.1,0.09,0.07,0.04,0.04,0.04,0.04,0.04,0.04,0.03]},{"source":"kalshi","id":"KXHIGHCHI-26MAY31-T81","event_id":"KXHIGHCHI-26MAY31","slug":"KXHIGHCHI-26MAY31-T81","question":"Will the high temp in Chicago be >81° on May 31, 2026?","group_item_title":"82° or above","description":"If the highest temperature recorded at Chicago Midway, IL for May 31, 2026, is greater than 81° according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nNot all weather data is the same. While checking a source like AccuWeather or Google Weather may help guide your decision, the official and final value used to determine this market is the highest temperature as reported by the corresponding NWS Climatological Report (Daily) linked in the rules above. Preliminary NWS reporting and measurement methods may be subject to underlying rounding and conversion nuances. Traders should exercise caution when interpreting preliminary NWS data.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.01,0.99],"probability":0.01,"spread":0.01,"active":true,"closed":false,"start_date":"2026-05-30T14:00:00Z","end_date":"2026-06-07T14:00:00Z","closed_time":"2026-06-01T05:59:00Z","volume":2853.0,"volume_24hr":2853.0,"prob_24h_change":-0.019999999999999997,"volume_24h_change":2835.0,"normalized_vol_24hr":21.70627212524414,"normalized_volume":20.540800094604492,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-31T00:00:32.301636Z","fetched_at":"2026-05-30T23:59:50.552727Z","added_at":"2026-05-30T14:08:36.729359Z","url":"https://kalshi.com/markets/kxhighchi/highest-temperature-in-chicago-on-may-31-2026/kxhighchi-26may31","event_title":"Highest temperature in Chicago on May 31, 2026?","chart_24h":[0.03,0.02,0.01,0.01,0.01,0.01]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXHIGHCHI-26MAY31","as_of":"2026-05-31T01:18:54.599261Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"Highest temperature in Chicago on May 31, 2026?\" — top market at 33% probability across 6 outcomes","source_url":null}}