Recent short-range forecasts from the Finnish Meteorological Institute and European models point to a daily maximum near 20°C in Helsinki on July 25, with 19–21°C outcomes holding the bulk of market-implied probability due to modest ensemble spread. Key drivers include variable low-level cloud cover reducing insolation, weak southerly advection of slightly warmer Baltic air, and the potential timing of a weak frontal passage that could cap or boost afternoon temperatures by 1–2°C. July climatology places the average high near 21°C, so current conditions sit close to seasonal norms while model disagreement on boundary-layer mixing and radiative effects sustains the tight clustering around the central bins. Updated runs from national weather services in the next 48 hours will likely narrow the distribution 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 July 25?
20°C 38%
21°C 26%
19°C 23%
22°C 10%
15°C or below
<1%
16°C
1%
17°C
1%
18°C
5%
19°C
23%
20°C
38%
21°C
26%
22°C
10%
23°C
4%
24°C
1%
25°C or higher
<1%
20°C 38%
21°C 26%
19°C 23%
22°C 10%
15°C or below
<1%
16°C
1%
17°C
1%
18°C
5%
19°C
23%
20°C
38%
21°C
26%
22°C
10%
23°C
4%
24°C
1%
25°C or higher
<1%
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: Jul 23, 2026, 12:03 AM ET
Resolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...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 short-range forecasts from the Finnish Meteorological Institute and European models point to a daily maximum near 20°C in Helsinki on July 25, with 19–21°C outcomes holding the bulk of market-implied probability due to modest ensemble spread. Key drivers include variable low-level cloud cover reducing insolation, weak southerly advection of slightly warmer Baltic air, and the potential timing of a weak frontal passage that could cap or boost afternoon temperatures by 1–2°C. July climatology places the average high near 21°C, so current conditions sit close to seasonal norms while model disagreement on boundary-layer mixing and radiative effects sustains the tight clustering around the central bins. Updated runs from national weather services in the next 48 hours will likely narrow the distribution 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