{"source":"polymarket","id":"525789","ticker":"highest-temperature-in-helsinki-on-may-28-2026","slug":"highest-temperature-in-helsinki-on-may-28-2026","title":"Highest temperature in Helsinki on May 28?","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","active":true,"closed":false,"start_date":"2026-05-26T04:26:21.887755Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":1178.119064,"volume_24hr":1178.119064,"volume_24h_change":null,"normalized_vol_24hr":17.61876678466797,"normalized_volume":11.427789688110352,"liquidity":59460.55349,"open_interest":1411.711558,"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":"103040","slug":"daily-temperature","label":"Daily Temperature"},{"id":"104440","slug":"helsinki","label":"Helsinki"},{"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":"15°C","top_outcome_probability":0.31,"top_outcome_prob_24h_change":0.08499999999999999,"top_outcome_volume_24h_change":35.312916,"updated_at":"2026-05-26T15:56:12.821902Z","fetched_at":"2026-05-26T15:56:12.821902Z","added_at":"2026-05-26T04:21:47.453105Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026","chart_24h":[56.0,118.55,170.41,406.77361,438.60361,590.17361,596.17361,637.468413,738.608087,747.348087,769.797497,1006.2270560000001,1023.647056,1088.917056,1088.917056,1088.917056,1178.119064],"markets":[{"source":"polymarket","id":"2358904","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-15c","question":"Will the highest temperature in Helsinki be 15°C on May 28?","group_item_title":"15°C","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.31,0.69],"probability":0.31,"spread":0.06,"active":true,"closed":false,"start_date":"2026-05-26T04:12:55.876319Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":35.312916,"volume_24hr":35.312916,"prob_24h_change":0.08499999999999999,"volume_24h_change":35.312916,"normalized_vol_24hr":5.04482889175415,"normalized_volume":3.7858448028564453,"liquidity":1200.9116,"categories":["Climate and Weather"],"updated_at":"2026-05-26T15:56:28.372819Z","fetched_at":"2026-05-26T15:56:12.960870Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-15c","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.225,0.23,0.245,0.26,0.285,0.3,0.28,0.265,0.31,0.31,0.32,0.33,0.315,0.315,0.31,0.31]},{"source":"polymarket","id":"2358905","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-16c","question":"Will the highest temperature in Helsinki be 16°C on May 28?","group_item_title":"16°C","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.3,0.7],"probability":0.3,"spread":0.06,"active":true,"closed":false,"start_date":"2026-05-26T04:13:00.916765Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":51.42,"volume_24hr":51.42,"prob_24h_change":0.15,"volume_24h_change":5.0,"normalized_vol_24hr":6.12866735458374,"normalized_volume":4.599201202392578,"liquidity":1413.008,"categories":["Climate and Weather"],"updated_at":"2026-05-26T15:56:28.372819Z","fetched_at":"2026-05-26T15:56:12.960870Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-16c","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.15,0.145,0.15,0.175,0.195,0.215,0.175,0.19,0.215,0.24,0.25,0.3,0.295,0.29,0.285,0.29,0.3]},{"source":"polymarket","id":"2358903","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-14c","question":"Will the highest temperature in Helsinki be 14°C on May 28?","group_item_title":"14°C","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.18,0.82],"probability":0.18,"spread":0.02,"active":true,"closed":false,"start_date":"2026-05-26T04:12:49.734231Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":93.23923300000001,"volume_24hr":93.239233,"prob_24h_change":-0.04500000000000001,"volume_24h_change":93.239233,"normalized_vol_24hr":8.079034805297852,"normalized_volume":6.062836170196533,"liquidity":1210.989,"categories":["Climate and Weather"],"updated_at":"2026-05-26T15:56:28.372819Z","fetched_at":"2026-05-26T15:56:12.960870Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-14c","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.225,0.245,0.26,0.255,0.25,0.23,0.28,0.295,0.27,0.25,0.24,0.24,0.22,0.2,0.245,0.235,0.18]},{"source":"polymarket","id":"2358906","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-17corhigher","question":"Will the highest temperature in Helsinki be 17°C or higher on May 28?","group_item_title":"17°C or higher","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0865,0.9135],"probability":0.0865,"spread":0.035,"active":true,"closed":false,"start_date":"2026-05-26T04:13:02.734417Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":520.368502,"volume_24hr":520.368502,"prob_24h_change":-0.023500000000000007,"volume_24h_change":493.23850200000004,"normalized_vol_24hr":15.30342960357666,"normalized_volume":11.484315872192383,"liquidity":1629.99992,"categories":["Climate and Weather"],"updated_at":"2026-05-26T15:56:28.372819Z","fetched_at":"2026-05-26T15:56:12.960870Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-17corhigher","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.11,0.105,0.0315,0.035,0.0655,0.067,0.0675,0.0525,0.0625,0.0665,0.0685,0.075,0.1165,0.115,0.1145,0.0865]},{"source":"polymarket","id":"2358901","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-12c","question":"Will the highest temperature in Helsinki be 12°C on May 28?","group_item_title":"12°C","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.021,0.979],"probability":0.021,"spread":0.018,"active":true,"closed":false,"start_date":"2026-05-26T04:12:46.825958Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":9.00909,"volume_24hr":9.00909,"prob_24h_change":-0.114,"volume_24h_change":9.00909,"normalized_vol_24hr":2.0744638442993164,"normalized_volume":1.5567620992660522,"liquidity":2126.59457,"categories":["Climate and Weather"],"updated_at":"2026-05-26T15:41:59.705657Z","fetched_at":"2026-05-26T15:41:45.392999Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-12c","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.135,0.095,0.07,0.04,0.04,0.04,0.035,0.0415,0.0405,0.019,0.021,0.021,0.021,0.0205,0.0205,0.021]},{"source":"polymarket","id":"2358900","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-11c","question":"Will the highest temperature in Helsinki be 11°C on May 28?","group_item_title":"11°C","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0065,0.9935],"probability":0.0065,"spread":0.009,"active":true,"closed":false,"start_date":"2026-05-26T04:12:44.745003Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":179.66571299999998,"volume_24hr":179.665713,"prob_24h_change":-0.09849999999999999,"volume_24h_change":179.665713,"normalized_vol_24hr":10.557923316955566,"normalized_volume":7.923095226287842,"liquidity":4020.3531,"categories":["Climate and Weather"],"updated_at":"2026-05-26T15:56:39.943080Z","fetched_at":"2026-05-26T15:56:12.960870Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-11c","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.105,0.065,0.06,0.035,0.04,0.0295,0.0365,0.03,0.0105,0.011,0.0125,0.012,0.0115,0.0065]},{"source":"polymarket","id":"2358899","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-10c","question":"Will the highest temperature in Helsinki be 10°C on May 28?","group_item_title":"10°C","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.006,0.994],"probability":0.006,"spread":0.006,"active":true,"closed":false,"start_date":"2026-05-26T04:12:39.954859Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":134.9925,"volume_24hr":134.9925,"prob_24h_change":-0.009,"volume_24h_change":134.9925,"normalized_vol_24hr":9.43527603149414,"normalized_volume":7.0806145668029785,"liquidity":8192.52327,"categories":["Climate and Weather"],"updated_at":"2026-05-26T15:41:59.705657Z","fetched_at":"2026-05-26T15:41:45.392999Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-10c","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.015,0.03,0.015,0.0295,0.03,0.0295,0.0145,0.0065,0.007,0.0105,0.011,0.0115,0.0095,0.009,0.0085,0.006]},{"source":"polymarket","id":"2358896","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-7corbelow","question":"Will the highest temperature in Helsinki be 7°C or below on May 28?","group_item_title":"7°C or below","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.003,0.997],"probability":0.003,"spread":0.002,"active":true,"closed":false,"start_date":"2026-05-26T04:12:29.517144Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":15.0,"volume_24hr":15.0,"prob_24h_change":-0.002,"volume_24h_change":0.0,"normalized_vol_24hr":3.0054030418395996,"normalized_volume":2.2553768157958984,"liquidity":6898.57875,"categories":["Climate and Weather"],"updated_at":"2026-05-26T09:41:06.220250Z","fetched_at":"2026-05-26T09:40:58.449394Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-7corbelow","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.005,0.0055,0.0045,0.003]},{"source":"polymarket","id":"2358898","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-9c","question":"Will the highest temperature in Helsinki be 9°C on May 28?","group_item_title":"9°C","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.003,0.997],"probability":0.003,"spread":0.002,"active":true,"closed":false,"start_date":"2026-05-26T04:12:32.781948Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":126.11111,"volume_24hr":126.11111,"prob_24h_change":-0.0024999999999999996,"volume_24h_change":111.11111,"normalized_vol_24hr":9.177627563476562,"normalized_volume":6.887265205383301,"liquidity":3253.64663,"categories":["Climate and Weather"],"updated_at":"2026-05-26T06:41:30.146332Z","fetched_at":"2026-05-26T06:41:09.166448Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-9c","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.0055,0.006,0.003]},{"source":"polymarket","id":"2358897","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-8c","question":"Will the highest temperature in Helsinki be 8°C on May 28?","group_item_title":"8°C","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.0025,0.9975],"probability":0.0025,"spread":0.003,"active":true,"closed":false,"start_date":"2026-05-26T04:12:32.519802Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":15.0,"volume_24hr":15.0,"prob_24h_change":-0.0029999999999999996,"volume_24h_change":0.0,"normalized_vol_24hr":3.0054030418395996,"normalized_volume":2.2553768157958984,"liquidity":6547.8262,"categories":["Climate and Weather"],"updated_at":"2026-05-26T09:41:06.220250Z","fetched_at":"2026-05-26T09:40:58.449394Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-8c","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.0055,0.0055,0.005,0.0025]},{"source":"polymarket","id":"2358902","event_id":"525789","slug":"highest-temperature-in-helsinki-on-may-28-2026-13c","question":"Will the highest temperature in Helsinki be 13°C on May 28?","group_item_title":"13°C","description":"This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 28 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 Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.\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 Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.\n\nAny revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/hel-537d0cb3c2.jpg","outcomes":["Yes","No"],"outcome_prices":[0.06,0.94],"probability":0.06,"spread":0.02,"active":true,"closed":false,"start_date":"2026-05-26T04:12:48.958744Z","end_date":"2026-05-28T12:00:00Z","closed_time":null,"volume":0.0,"volume_24hr":0.0,"prob_24h_change":-0.135,"volume_24h_change":0.0,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":1713.3567,"categories":["Climate and Weather"],"updated_at":"2026-05-26T14:59:19.152830Z","fetched_at":"2026-05-26T14:59:02.042085Z","added_at":"2026-05-26T04:21:47.522363Z","url":"https://polymarket.com/event/highest-temperature-in-helsinki-on-may-28-2026/highest-temperature-in-helsinki-on-may-28-2026-13c","event_title":"Highest temperature in Helsinki on May 28?","chart_24h":[0.195,0.175,0.18,0.165,0.16,0.11,0.09,0.1,0.065,0.085,0.11,0.07,0.06,0.06,0.06]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/525789","as_of":"2026-05-26T16:06:42.275984Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"Highest temperature in Helsinki on May 28?\" — top market at 9% probability across 11 outcomes","source_url":null}}