**Current official forecasts from the Finnish Meteorological Institute and timeanddate.com converge on a daytime high of 19°C for Helsinki on August 25, 2026, under partly cloudy skies with light winds.** This aligns with late-August climatology, where average highs decline from mid-summer peaks toward 19–20°C amid moderating Gulf of Finland maritime influence that dampens extremes. Recent days of cooler, showery conditions (highs near 16–18°C) have kept expectations grounded, while short-range model consensus leaves limited room for significant deviation. The tight split between 19°C (36%) and 20°C (32.5%) reflects residual uncertainty in exact peak timing or localized warming under breaks in cloud cover, with lower probabilities assigned to 18°C or 21°C+ outcomes. Updated model runs and observations over the next 48 hours will clarify whether subtle steering patterns push the maximum across the 20°C threshold.
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 25?
Highest temperature in Helsinki on August 25?
19°C 37%
20°C 33%
18°C 20%
21°C 15%
NEW
NEW
Aug 25, 2026
13°C or below
1%
14°C
<1%
15°C
1%
16°C
4%
17°C
3%
18°C
20%
19°C
37%
20°C
33%
21°C
15%
22°C
9%
23°C or higher
2%
19°C 37%
20°C 33%
18°C 20%
21°C 15%
NEW
NEW
Aug 25, 2026
13°C or below
$55 Vol.
1%
14°C
$50 Vol.
<1%
15°C
$50 Vol.
1%
16°C
$10 Vol.
4%
17°C
$105 Vol.
3%
18°C
$344 Vol.
20%
19°C
$99 Vol.
37%
20°C
$67 Vol.
33%
21°C
$135 Vol.
15%
22°C
$10 Vol.
9%
23°C or higher
$10 Vol.
2%
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 25 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
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.**Current official forecasts from the Finnish Meteorological Institute and timeanddate.com converge on a daytime high of 19°C for Helsinki on August 25, 2026, under partly cloudy skies with light winds.** This aligns with late-August climatology, where average highs decline from mid-summer peaks toward 19–20°C amid moderating Gulf of Finland maritime influence that dampens extremes. Recent days of cooler, showery conditions (highs near 16–18°C) have kept expectations grounded, while short-range model consensus leaves limited room for significant deviation. The tight split between 19°C (36%) and 20°C (32.5%) reflects residual uncertainty in exact peak timing or localized warming under breaks in cloud cover, with lower probabilities assigned to 18°C or 21°C+ outcomes. Updated model runs and observations over the next 48 hours will clarify whether subtle steering patterns push the maximum across the 20°C threshold.
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 25 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
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
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 23, 2026, 12:58 AM ET
Volume
$934End Date
Aug 25, 2026Market Opened
Aug 23, 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 25 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
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.**Current official forecasts from the Finnish Meteorological Institute and timeanddate.com converge on a daytime high of 19°C for Helsinki on August 25, 2026, under partly cloudy skies with light winds.** This aligns with late-August climatology, where average highs decline from mid-summer peaks toward 19–20°C amid moderating Gulf of Finland maritime influence that dampens extremes. Recent days of cooler, showery conditions (highs near 16–18°C) have kept expectations grounded, while short-range model consensus leaves limited room for significant deviation. The tight split between 19°C (36%) and 20°C (32.5%) reflects residual uncertainty in exact peak timing or localized warming under breaks in cloud cover, with lower probabilities assigned to 18°C or 21°C+ outcomes. Updated model runs and observations over the next 48 hours will clarify whether subtle steering patterns push the maximum across the 20°C threshold.
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 25 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
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
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
$934End Date
Aug 25, 2026Market Opened
Aug 23, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...**Current official forecasts from the Finnish Meteorological Institute and timeanddate.com converge on a daytime high of 19°C for Helsinki on August 25, 2026, under partly cloudy skies with light winds.** This aligns with late-August climatology, where average highs decline from mid-summer peaks toward 19–20°C amid moderating Gulf of Finland maritime influence that dampens extremes. Recent days of cooler, showery conditions (highs near 16–18°C) have kept expectations grounded, while short-range model consensus leaves limited room for significant deviation. The tight split between 19°C (36%) and 20°C (32.5%) reflects residual uncertainty in exact peak timing or localized warming under breaks in cloud cover, with lower probabilities assigned to 18°C or 21°C+ outcomes. Updated model runs and observations over the next 48 hours will clarify whether subtle steering patterns push the maximum across the 20°C threshold.
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