{"source":"kalshi","id":"KXHIGHTBOS-26MAY30","ticker":"KXHIGHTBOS-26MAY30","slug":"KXHIGHTBOS-26MAY30","title":"Highest temperature in Boston on May 30, 2026?","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-05-29T14:00:00Z","end_date":"2026-06-06T14:00:00Z","closed_time":null,"volume":51875.82,"volume_24hr":49403.53,"volume_24h_change":null,"normalized_vol_24hr":40.48112869262695,"normalized_volume":31.801616668701172,"liquidity":null,"open_interest":39997.2,"categories":["Climate and Weather"],"tags":[],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"58° to 59°","top_outcome_probability":0.99,"top_outcome_prob_24h_change":0.71,"top_outcome_volume_24h_change":10952.01,"updated_at":"2026-05-30T21:26:48.825539Z","fetched_at":"2026-05-30T21:26:48.825539Z","added_at":"2026-05-29T14:04:00.782181Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-30-2026/kxhightbos-26may30","chart_24h":[2481.29,2493.29,2991.54,3623.14,3870.0099999999998,4356.19,6025.04,7125.64,10089.97,11453.75,12856.07,15777.11,16125.02,16973.08,17231.25,17329.2,17660.59,18999.74,21852.2,22041.97,22800.77,24698.66,26343.85,29841.35,30103.95,31421.300000000003,36990.46,40147.95,45571.89,46568.1,47025.78,47411.25,48331.81,49619.04,49449.560000000005],"markets":[{"source":"kalshi","id":"KXHIGHTBOS-26MAY30-B58.5","event_id":"KXHIGHTBOS-26MAY30","slug":"KXHIGHTBOS-26MAY30-B58.5","question":"Will the maximum temperature be 58-59° on May 30, 2026?","group_item_title":"58° to 59°","description":"If the maximum temperature recorded at Boston for May 30, 2026, is between 58-59° fahrenheit according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nData for CLIBOS can be found by clicking the following URL: https://www.weather.gov/wrh/climate?wfo=box, navigating to the \"Observed Weather\" tab, and choosing the location \"Boston (Logan Airport), MA\" with Daily Climate Report selected. Please use the latest version of the data for the desired date, keeping in mind that different cities update their reports at different frequencies.\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 maximum/minimum 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":[0.99,0.010000000000000009],"probability":0.99,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-05-29T14:00:00Z","end_date":"2026-06-06T14:00:00Z","closed_time":"2026-05-31T05:00:00Z","volume":11158.51,"volume_24hr":11055.76,"prob_24h_change":0.71,"volume_24h_change":10952.01,"normalized_vol_24hr":32.12215805053711,"normalized_volume":28.184606552124023,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:40:50.972830Z","fetched_at":"2026-05-30T21:40:50.972830Z","added_at":"2026-05-29T14:04:00.947832Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-30-2026/kxhightbos-26may30","event_title":"Highest temperature in Boston on May 30, 2026?","chart_24h":[0.28,0.28,0.28,0.28,0.31,0.31,0.34,0.38,0.38,0.39,0.71,0.55,0.5,0.8,0.86,0.91,0.96,0.92,0.97,0.98,0.97,0.86,0.86,0.94,0.97,0.97,0.99,0.94,0.95,0.98,0.99,0.99,0.96,0.99,0.99]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY30-B60.5","event_id":"KXHIGHTBOS-26MAY30","slug":"KXHIGHTBOS-26MAY30-B60.5","question":"Will the maximum temperature be 60-61° on May 30, 2026?","group_item_title":"60° to 61°","description":"If the maximum temperature recorded at Boston for May 30, 2026, is between 60-61° fahrenheit according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nData for CLIBOS can be found by clicking the following URL: https://www.weather.gov/wrh/climate?wfo=box, navigating to the \"Observed Weather\" tab, and choosing the location \"Boston (Logan Airport), MA\" with Daily Climate Report selected. Please use the latest version of the data for the desired date, keeping in mind that different cities update their reports at different frequencies.\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 maximum/minimum 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":[0.02,0.98],"probability":0.02,"spread":0.01,"active":true,"closed":false,"start_date":"2026-05-29T14:00:00Z","end_date":"2026-06-06T14:00:00Z","closed_time":"2026-05-31T05:00:00Z","volume":5928.74,"volume_24hr":5718.23,"prob_24h_change":-0.22,"volume_24h_change":5507.719999999999,"normalized_vol_24hr":27.735193252563477,"normalized_volume":24.490007400512695,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:27:33.181367Z","fetched_at":"2026-05-30T21:26:49.041381Z","added_at":"2026-05-29T14:04:00.947832Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-30-2026/kxhightbos-26may30","event_title":"Highest temperature in Boston on May 30, 2026?","chart_24h":[0.24,0.29,0.3,0.31,0.34,0.31,0.25,0.22,0.23,0.23,0.22,0.36,0.33,0.13,0.13,0.1,0.14,0.03,0.01,0.02,0.07,0.02,0.13,0.05,0.02,0.02,0.01,0.01,0.03,0.01,0.01,0.01,0.01,0.02,0.02]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY30-B54.5","event_id":"KXHIGHTBOS-26MAY30","slug":"KXHIGHTBOS-26MAY30-B54.5","question":"Will the maximum temperature be 54-55° on May 30, 2026?","group_item_title":"54° to 55°","description":"If the maximum temperature recorded at Boston for May 30, 2026, is between 54-55° fahrenheit according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nData for CLIBOS can be found by clicking the following URL: https://www.weather.gov/wrh/climate?wfo=box, navigating to the \"Observed Weather\" tab, and choosing the location \"Boston (Logan Airport), MA\" with Daily Climate Report selected. Please use the latest version of the data for the desired date, keeping in mind that different cities update their reports at different frequencies.\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 maximum/minimum 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":"2026-05-29T14:00:00Z","end_date":"2026-06-06T14:00:00Z","closed_time":"2026-05-31T05:00:00Z","volume":6363.5,"volume_24hr":6194.06,"prob_24h_change":-0.08,"volume_24h_change":6015.620000000001,"normalized_vol_24hr":28.249961853027344,"normalized_volume":24.890539169311523,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-30T20:45:49.632552Z","fetched_at":"2026-05-30T20:45:06.538732Z","added_at":"2026-05-29T14:04:00.947832Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-30-2026/kxhightbos-26may30","event_title":"Highest temperature in Boston on May 30, 2026?","chart_24h":[0.09,0.08,0.05,0.08,0.08,0.05,0.06,0.05,0.02,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY30-B56.5","event_id":"KXHIGHTBOS-26MAY30","slug":"KXHIGHTBOS-26MAY30-B56.5","question":"Will the maximum temperature be 56-57° on May 30, 2026?","group_item_title":"56° to 57°","description":"If the maximum temperature recorded at Boston for May 30, 2026, is between 56-57° fahrenheit according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nData for CLIBOS can be found by clicking the following URL: https://www.weather.gov/wrh/climate?wfo=box, navigating to the \"Observed Weather\" tab, and choosing the location \"Boston (Logan Airport), MA\" with Daily Climate Report selected. Please use the latest version of the data for the desired date, keeping in mind that different cities update their reports at different frequencies.\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 maximum/minimum 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":"2026-05-29T14:00:00Z","end_date":"2026-06-06T14:00:00Z","closed_time":"2026-05-31T05:00:00Z","volume":10322.44,"volume_24hr":10070.67,"prob_24h_change":-0.19999999999999998,"volume_24h_change":9819.9,"normalized_vol_24hr":31.482797622680664,"normalized_volume":27.715572357177734,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:40:50.972830Z","fetched_at":"2026-05-30T21:40:50.972830Z","added_at":"2026-05-29T14:04:00.947832Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-30-2026/kxhightbos-26may30","event_title":"Highest temperature in Boston on May 30, 2026?","chart_24h":[0.21,0.21,0.21,0.22,0.19,0.2,0.24,0.23,0.18,0.11,0.12,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY30-T54","event_id":"KXHIGHTBOS-26MAY30","slug":"KXHIGHTBOS-26MAY30-T54","question":"Will the maximum temperature be <54° on May 30, 2026?","group_item_title":"53° or below","description":"If the maximum temperature recorded at Boston for May 30, 2026, is less than 54° fahrenheit according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nData for CLIBOS can be found by clicking the following URL: https://www.weather.gov/wrh/climate?wfo=box, navigating to the \"Observed Weather\" tab, and choosing the location \"Boston (Logan Airport), MA\" with Daily Climate Report selected. Please use the latest version of the data for the desired date, keeping in mind that different cities update their reports at different frequencies.\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 maximum/minimum 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":"2026-05-29T14:00:00Z","end_date":"2026-06-06T14:00:00Z","closed_time":"2026-05-31T05:00:00Z","volume":11021.59,"volume_24hr":9931.04,"prob_24h_change":-0.03,"volume_24h_change":8840.490000000002,"normalized_vol_24hr":31.38682746887207,"normalized_volume":28.109989166259766,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:27:22.676834Z","fetched_at":"2026-05-30T21:12:47.534436Z","added_at":"2026-05-29T14:04:00.947832Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-30-2026/kxhightbos-26may30","event_title":"Highest temperature in Boston on May 30, 2026?","chart_24h":[0.04,0.04,0.02,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01,0.01]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY30-T61","event_id":"KXHIGHTBOS-26MAY30","slug":"KXHIGHTBOS-26MAY30-T61","question":"Will the maximum temperature be >61° on May 30, 2026?","group_item_title":"62° or above","description":"If the maximum temperature recorded at Boston for May 30, 2026, is greater than 61° fahrenheit according to the National Weather Service's Climatological Report (Daily), then the market resolves to Yes.\n\n---\n\nData for CLIBOS can be found by clicking the following URL: https://www.weather.gov/wrh/climate?wfo=box, navigating to the \"Observed Weather\" tab, and choosing the location \"Boston (Logan Airport), MA\" with Daily Climate Report selected. Please use the latest version of the data for the desired date, keeping in mind that different cities update their reports at different frequencies.\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 maximum/minimum 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":"2026-05-29T14:00:00Z","end_date":"2026-06-06T14:00:00Z","closed_time":"2026-05-31T05:00:00Z","volume":7081.04,"volume_24hr":6433.77,"prob_24h_change":-0.12000000000000001,"volume_24h_change":5786.5,"normalized_vol_24hr":28.496152877807617,"normalized_volume":25.50141716003418,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-30T21:27:33.181367Z","fetched_at":"2026-05-30T21:26:49.041381Z","added_at":"2026-05-29T14:04:00.947832Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-30-2026/kxhightbos-26may30","event_title":"Highest temperature in Boston on May 30, 2026?","chart_24h":[0.13,0.14,0.13,0.13,0.13,0.08,0.07,0.05,0.1,0.03,0.02,0.04,0.03,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.02,0.03,0.02,0.01,0.01,0.01,0.02,0.03,0.01,0.01,0.01,0.01,0.01,0.01]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXHIGHTBOS-26MAY30","as_of":"2026-05-30T21:41:21.220320Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"Highest temperature in Boston on May 30, 2026?\" — top market at 99% probability across 6 outcomes","source_url":null}}