Recent official forecasts from the Finnish Meteorological Institute and European models indicate a daytime maximum near 20°C in Helsinki on August 21, driven by moderate southwesterly flow, partial cloud cover, and limited solar heating under a stable air mass. The tight market split between 21°C and 20°C reflects small uncertainties in boundary-layer mixing and exact timing of any clearing skies, which could add or subtract 1°C at peak. Historical August averages around 19–20°C provide context, while upcoming high-resolution model runs will likely refine the precise maximum before 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 21?
21°C 41%
20°C 32%
19°C 18%
22°C 10%
$17,687 Vol.
$17,687 Vol.
14°C or below
<1%
15°C
<1%
16°C
<1%
17°C
<1%
18°C
2%
19°C
18%
20°C
32%
21°C
41%
22°C
10%
23°C
<1%
24°C or higher
<1%
21°C 41%
20°C 32%
19°C 18%
22°C 10%
$17,687 Vol.
$17,687 Vol.
14°C or below
<1%
15°C
<1%
16°C
<1%
17°C
<1%
18°C
2%
19°C
18%
20°C
32%
21°C
41%
22°C
10%
23°C
<1%
24°C or higher
<1%
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 21 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 19, 2026, 12:57 AM ET
Resolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 21 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.
Resolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Recent official forecasts from the Finnish Meteorological Institute and European models indicate a daytime maximum near 20°C in Helsinki on August 21, driven by moderate southwesterly flow, partial cloud cover, and limited solar heating under a stable air mass. The tight market split between 21°C and 20°C reflects small uncertainties in boundary-layer mixing and exact timing of any clearing skies, which could add or subtract 1°C at peak. Historical August averages around 19–20°C provide context, while upcoming high-resolution model runs will likely refine the precise maximum before resolution.
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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