{"source":"kalshi","id":"KXHIGHTBOS-26MAY27","ticker":"KXHIGHTBOS-26MAY27","slug":"KXHIGHTBOS-26MAY27","title":"Highest temperature in Boston on May 27, 2026?","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-05-26T14:00:00Z","end_date":"2026-06-03T14:00:00Z","closed_time":null,"volume":6496.83,"volume_24hr":6136.82,"volume_24h_change":null,"normalized_vol_24hr":25.590986251831055,"normalized_volume":20.012094497680664,"liquidity":null,"open_interest":4652.45,"categories":["Climate and Weather"],"tags":[],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"89° or above","top_outcome_probability":0.33,"top_outcome_prob_24h_change":0.26,"top_outcome_volume_24h_change":1539.44,"updated_at":"2026-05-26T23:06:14.979209Z","fetched_at":"2026-05-26T23:06:14.979209Z","added_at":"2026-05-26T14:04:58.593549Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-27-2026/kxhightbos-26may27","chart_24h":[0.0,216.05,1013.3199999999999,1208.93,1480.54,1525.54,1622.5,2128.71,2228.96,3506.96,4431.24,5628.38,5826.38,5947.78],"markets":[{"source":"kalshi","id":"KXHIGHTBOS-26MAY27-T88","event_id":"KXHIGHTBOS-26MAY27","slug":"KXHIGHTBOS-26MAY27-T88","question":"Will the maximum temperature be  >88° on May 27, 2026?","group_item_title":"89° or above","description":"If the maximum temperature recorded at Boston for May 27, 2026, is greater than 88° 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":[0.33,0.6699999999999999],"probability":0.33,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-05-26T14:00:00Z","end_date":"2026-06-03T14:00:00Z","closed_time":"2026-05-28T05:00:00Z","volume":1888.45,"volume_24hr":1539.44,"prob_24h_change":0.26,"volume_24h_change":1539.44,"normalized_vol_24hr":19.60076332092285,"normalized_volume":18.466466903686523,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-26T23:06:39.905317Z","fetched_at":"2026-05-26T23:06:15.070617Z","added_at":"2026-05-26T14:04:58.660577Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-27-2026/kxhightbos-26may27","event_title":"Highest temperature in Boston on May 27, 2026?","chart_24h":[0.07,0.18,0.21,0.2,0.21,0.22,0.24,0.22,0.22,0.25,0.32,0.33,0.33,0.33]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY27-B87.5","event_id":"KXHIGHTBOS-26MAY27","slug":"KXHIGHTBOS-26MAY27-B87.5","question":"Will the maximum temperature be  87-88° on May 27, 2026?","group_item_title":"87° to 88°","description":"If the maximum temperature recorded at Boston for May 27, 2026, is between 87-88° 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":[0.31,0.69],"probability":0.31,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-05-26T14:00:00Z","end_date":"2026-06-03T14:00:00Z","closed_time":"2026-05-28T05:00:00Z","volume":864.93,"volume_24hr":863.93,"prob_24h_change":0.31,"volume_24h_change":863.93,"normalized_vol_24hr":16.639314651489258,"normalized_volume":14.844233512878418,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-26T23:06:39.905317Z","fetched_at":"2026-05-26T23:06:15.070617Z","added_at":"2026-05-26T14:04:58.660577Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-27-2026/kxhightbos-26may27","event_title":"Highest temperature in Boston on May 27, 2026?","chart_24h":[0.0,0.29,0.28,0.29,0.28,0.27,0.28,0.28,0.33,0.27,0.28,0.28,0.31]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY27-B85.5","event_id":"KXHIGHTBOS-26MAY27","slug":"KXHIGHTBOS-26MAY27-B85.5","question":"Will the maximum temperature be  85-86° on May 27, 2026?","group_item_title":"85° to 86°","description":"If the maximum temperature recorded at Boston for May 27, 2026, is between 85-86° 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":[0.17,0.83],"probability":0.17,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-05-26T14:00:00Z","end_date":"2026-06-03T14:00:00Z","closed_time":"2026-05-28T05:00:00Z","volume":690.52,"volume_24hr":690.52,"prob_24h_change":0.17,"volume_24h_change":690.52,"normalized_vol_24hr":15.556436538696289,"normalized_volume":13.87343692779541,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-26T22:40:10.185259Z","fetched_at":"2026-05-26T22:39:36.170947Z","added_at":"2026-05-26T14:04:58.660577Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-27-2026/kxhightbos-26may27","event_title":"Highest temperature in Boston on May 27, 2026?","chart_24h":[0.0,0.25,0.27,0.27,0.25,0.29,0.29,0.26,0.19,0.17,0.17,0.17]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY27-B83.5","event_id":"KXHIGHTBOS-26MAY27","slug":"KXHIGHTBOS-26MAY27-B83.5","question":"Will the maximum temperature be  83-84° on May 27, 2026?","group_item_title":"83° to 84°","description":"If the maximum temperature recorded at Boston for May 27, 2026, is between 83-84° 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":[0.09,0.91],"probability":0.09,"spread":0.010000000000000009,"active":true,"closed":false,"start_date":"2026-05-26T14:00:00Z","end_date":"2026-06-03T14:00:00Z","closed_time":"2026-05-28T05:00:00Z","volume":359.07,"volume_24hr":359.07,"prob_24h_change":0.09,"volume_24h_change":359.07,"normalized_vol_24hr":12.60626220703125,"normalized_volume":11.242432594299316,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-26T23:06:15.070617Z","fetched_at":"2026-05-26T23:06:15.070617Z","added_at":"2026-05-26T14:04:58.660577Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-27-2026/kxhightbos-26may27","event_title":"Highest temperature in Boston on May 27, 2026?","chart_24h":[0.0,0.0,0.0,0.12,0.12,0.1,0.14,0.14,0.08,0.1,0.1,0.1,0.09]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY27-B81.5","event_id":"KXHIGHTBOS-26MAY27","slug":"KXHIGHTBOS-26MAY27-B81.5","question":"Will the maximum temperature be  81-82° on May 27, 2026?","group_item_title":"81° to 82°","description":"If the maximum temperature recorded at Boston for May 27, 2026, is between 81-82° 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":[0.03,0.97],"probability":0.03,"spread":0.010000000000000002,"active":true,"closed":false,"start_date":"2026-05-26T14:00:00Z","end_date":"2026-06-03T14:00:00Z","closed_time":"2026-05-28T05:00:00Z","volume":549.05,"volume_24hr":549.05,"prob_24h_change":0.03,"volume_24h_change":549.05,"normalized_vol_24hr":14.486443519592285,"normalized_volume":12.91920280456543,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-26T22:39:36.170947Z","fetched_at":"2026-05-26T22:39:36.170947Z","added_at":"2026-05-26T14:04:58.660577Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-27-2026/kxhightbos-26may27","event_title":"Highest temperature in Boston on May 27, 2026?","chart_24h":[0.0,0.07,0.05,0.06,0.06,0.05,0.03,0.03,0.03]},{"source":"kalshi","id":"KXHIGHTBOS-26MAY27-T81","event_id":"KXHIGHTBOS-26MAY27","slug":"KXHIGHTBOS-26MAY27-T81","question":"Will the maximum temperature be  <81° on May 27, 2026?","group_item_title":"80° or below","description":"If the maximum temperature recorded at Boston for May 27, 2026, is less than 81° 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":"2026-05-26T14:00:00Z","end_date":"2026-06-03T14:00:00Z","closed_time":"2026-05-28T05:00:00Z","volume":2144.81,"volume_24hr":2134.81,"prob_24h_change":0.02,"volume_24h_change":2134.81,"normalized_vol_24hr":21.38491439819336,"normalized_volume":19.0945987701416,"liquidity":null,"categories":["Climate and Weather"],"updated_at":"2026-05-26T23:06:39.905317Z","fetched_at":"2026-05-26T23:06:15.070617Z","added_at":"2026-05-26T14:04:58.660577Z","url":"https://kalshi.com/markets/kxhightbos/highest-temperature-in-boston-on-may-27-2026/kxhightbos-26may27","event_title":"Highest temperature in Boston on May 27, 2026?","chart_24h":[0.0,0.04,0.03,0.02,0.02,0.02,0.02,0.02,0.02,0.01,0.02,0.02]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXHIGHTBOS-26MAY27","as_of":"2026-05-26T23:07:55.227719Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"Highest temperature in Boston on May 27, 2026?\" — top market at 2% probability across 6 outcomes","source_url":null}}