Recent ensemble forecasts from the Finnish Meteorological Institute and ECMWF models indicate peak daytime temperatures in Helsinki on August 17 will likely reach 20–21°C, aligning with the closely matched market-implied probabilities of 35% and 40.5% for those outcomes. Persistent southwesterly flow and partial cloud cover are limiting solar heating while moderating maritime air from the Baltic Sea, keeping values near seasonal norms of 19–20°C. Minor model spreads arise from uncertainties in afternoon clearing and exact wind shifts, which could push readings to 22°C or hold them at 19°C. Updated model runs and FMI briefings tomorrow morning represent key decision points for traders monitoring these thresholds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Helsinki on August 17?
Highest temperature in Helsinki on August 17?
21°C 40%
20°C 36%
19°C 11%
22°C 9%
NEW
NEW
Aug 17, 2026
15°C or below
<1%
16°C
1%
17°C
2%
18°C
4%
19°C
11%
20°C
36%
21°C
40%
22°C
9%
23°C
2%
24°C
2%
25°C or higher
<1%
21°C 40%
20°C 36%
19°C 11%
22°C 9%
NEW
NEW
Aug 17, 2026
15°C or below
$29 Vol.
<1%
16°C
$29 Vol.
1%
17°C
$120 Vol.
2%
18°C
$28 Vol.
4%
19°C
$90 Vol.
11%
20°C
$162 Vol.
36%
21°C
$280 Vol.
40%
22°C
$670 Vol.
9%
23°C
$256 Vol.
2%
24°C
$120 Vol.
2%
25°C or higher
$54 Vol.
<1%
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 Aug '26.
The 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.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The 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.
Revisions 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.Recent ensemble forecasts from the Finnish Meteorological Institute and ECMWF models indicate peak daytime temperatures in Helsinki on August 17 will likely reach 20–21°C, aligning with the closely matched market-implied probabilities of 35% and 40.5% for those outcomes. Persistent southwesterly flow and partial cloud cover are limiting solar heating while moderating maritime air from the Baltic Sea, keeping values near seasonal norms of 19–20°C. Minor model spreads arise from uncertainties in afternoon clearing and exact wind shifts, which could push readings to 22°C or hold them at 19°C. Updated model runs and FMI briefings tomorrow morning represent key decision points for traders monitoring these thresholds.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 Aug '26.
The 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.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The 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.
Revisions 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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 Aug '26.
The 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.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The 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.
Revisions 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.
Market Opened: Aug 15, 2026, 4:07 PM ET
Volume
$1,839End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 4:07 PM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 Aug '26.
The 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.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The 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.
Revisions 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.Recent ensemble forecasts from the Finnish Meteorological Institute and ECMWF models indicate peak daytime temperatures in Helsinki on August 17 will likely reach 20–21°C, aligning with the closely matched market-implied probabilities of 35% and 40.5% for those outcomes. Persistent southwesterly flow and partial cloud cover are limiting solar heating while moderating maritime air from the Baltic Sea, keeping values near seasonal norms of 19–20°C. Minor model spreads arise from uncertainties in afternoon clearing and exact wind shifts, which could push readings to 22°C or hold them at 19°C. Updated model runs and FMI briefings tomorrow morning represent key decision points for traders monitoring these thresholds.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 Aug '26.
The 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.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The 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.
Revisions 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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 Aug '26.
The 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.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The 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.
Revisions 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.
Volume
$1,839End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 4:07 PM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Recent ensemble forecasts from the Finnish Meteorological Institute and ECMWF models indicate peak daytime temperatures in Helsinki on August 17 will likely reach 20–21°C, aligning with the closely matched market-implied probabilities of 35% and 40.5% for those outcomes. Persistent southwesterly flow and partial cloud cover are limiting solar heating while moderating maritime air from the Baltic Sea, keeping values near seasonal norms of 19–20°C. Minor model spreads arise from uncertainties in afternoon clearing and exact wind shifts, which could push readings to 22°C or hold them at 19°C. Updated model runs and FMI briefings tomorrow morning represent key decision points for traders monitoring these thresholds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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