Recent forecasts from multiple models indicate a cool, cloudy pattern with widespread rain and thunderstorms expected over Helsinki on August 31, 2026, keeping daytime highs centered near 18–19°C. Persistent southerly flow off the Baltic Sea, combined with high humidity and cloud cover, is limiting solar heating and suppressing temperature peaks, consistent with late-August climatology for the region. Trader consensus reflected in the leading 19°C (44%) and 18°C (23.5%) outcomes aligns with this stable outlook, while lower probabilities for 20°C+ or cooler extremes capture residual model spread. New runs from the Finnish Meteorological Institute and European ensembles in the next 24–48 hours will refine timing of any clearing or intensification of precipitation, potentially shifting implied probabilities ahead of market resolution.
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 31?
Highest temperature in Helsinki on August 31?
19°C 44%
20°C 27%
18°C 23%
17°C 9%
NEW
NEW
Aug 31, 2026
12°C or below
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
4%
17°C
9%
18°C
23%
19°C
44%
20°C
27%
21°C
5%
22°C or higher
4%
19°C 44%
20°C 27%
18°C 23%
17°C 9%
NEW
NEW
Aug 31, 2026
12°C or below
$294 Vol.
<1%
13°C
$294 Vol.
<1%
14°C
$6 Vol.
<1%
15°C
$117 Vol.
<1%
16°C
$0 Vol.
4%
17°C
$150 Vol.
9%
18°C
$364 Vol.
23%
19°C
$50 Vol.
44%
20°C
$30 Vol.
27%
21°C
$66 Vol.
5%
22°C or higher
$6 Vol.
4%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 31 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °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 forecasts from multiple models indicate a cool, cloudy pattern with widespread rain and thunderstorms expected over Helsinki on August 31, 2026, keeping daytime highs centered near 18–19°C. Persistent southerly flow off the Baltic Sea, combined with high humidity and cloud cover, is limiting solar heating and suppressing temperature peaks, consistent with late-August climatology for the region. Trader consensus reflected in the leading 19°C (44%) and 18°C (23.5%) outcomes aligns with this stable outlook, while lower probabilities for 20°C+ or cooler extremes capture residual model spread. New runs from the Finnish Meteorological Institute and European ensembles in the next 24–48 hours will refine timing of any clearing or intensification of precipitation, potentially shifting implied probabilities ahead of market resolution.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 31 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °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.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °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 29, 2026, 12:58 AM ET
Volume
$802End Date
Aug 31, 2026Market Opened
Aug 29, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 31 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °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 forecasts from multiple models indicate a cool, cloudy pattern with widespread rain and thunderstorms expected over Helsinki on August 31, 2026, keeping daytime highs centered near 18–19°C. Persistent southerly flow off the Baltic Sea, combined with high humidity and cloud cover, is limiting solar heating and suppressing temperature peaks, consistent with late-August climatology for the region. Trader consensus reflected in the leading 19°C (44%) and 18°C (23.5%) outcomes aligns with this stable outlook, while lower probabilities for 20°C+ or cooler extremes capture residual model spread. New runs from the Finnish Meteorological Institute and European ensembles in the next 24–48 hours will refine timing of any clearing or intensification of precipitation, potentially shifting implied probabilities ahead of market resolution.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 31 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °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.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °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
$802End Date
Aug 31, 2026Market Opened
Aug 29, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Recent forecasts from multiple models indicate a cool, cloudy pattern with widespread rain and thunderstorms expected over Helsinki on August 31, 2026, keeping daytime highs centered near 18–19°C. Persistent southerly flow off the Baltic Sea, combined with high humidity and cloud cover, is limiting solar heating and suppressing temperature peaks, consistent with late-August climatology for the region. Trader consensus reflected in the leading 19°C (44%) and 18°C (23.5%) outcomes aligns with this stable outlook, while lower probabilities for 20°C+ or cooler extremes capture residual model spread. New runs from the Finnish Meteorological Institute and European ensembles in the next 24–48 hours will refine timing of any clearing or intensification of precipitation, potentially shifting implied probabilities ahead of market resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions