Recent ensemble forecasts from the Finnish Meteorological Institute, ECMWF, and Met Office converge on a daytime maximum of 20–22 °C for Helsinki on 15 August, placing the market’s tightly matched 22 °C (35.5 %) and 23 °C (34.0 %) outcomes at the center of current trader consensus. Mid-August climatology features declining solar angles and increasing Atlantic maritime influence that typically caps highs near 20 °C; however, small differences in predicted cloud cover, boundary-layer mixing, and 850 hPa temperatures can shift the peak by 1–2 °C. Light precipitation signals in some runs may further suppress insolation, while clearer scenarios allow brief warming toward 23 °C. Updated model runs and FMI nowcasts over the next 48 hours remain the key variables that could tilt resolution between these adjacent bins.
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 15?
Highest temperature in Helsinki on August 15?
22°C 35%
23°C 34%
21°C 15%
24°C 13%
NEW
NEW
Aug 15, 2026
17°C or below
1%
18°C
1%
19°C
3%
20°C
4%
21°C
15%
22°C
35%
23°C
34%
24°C
13%
25°C
3%
26°C
1%
27°C or higher
1%
22°C 35%
23°C 34%
21°C 15%
24°C 13%
NEW
NEW
Aug 15, 2026
17°C or below
$2,274 Vol.
1%
18°C
$193 Vol.
1%
19°C
$109 Vol.
3%
20°C
$9 Vol.
4%
21°C
$32 Vol.
15%
22°C
$71 Vol.
35%
23°C
$2 Vol.
34%
24°C
$71 Vol.
13%
25°C
$1 Vol.
3%
26°C
$27 Vol.
1%
27°C or higher
$29 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 15 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, ECMWF, and Met Office converge on a daytime maximum of 20–22 °C for Helsinki on 15 August, placing the market’s tightly matched 22 °C (35.5 %) and 23 °C (34.0 %) outcomes at the center of current trader consensus. Mid-August climatology features declining solar angles and increasing Atlantic maritime influence that typically caps highs near 20 °C; however, small differences in predicted cloud cover, boundary-layer mixing, and 850 hPa temperatures can shift the peak by 1–2 °C. Light precipitation signals in some runs may further suppress insolation, while clearer scenarios allow brief warming toward 23 °C. Updated model runs and FMI nowcasts over the next 48 hours remain the key variables that could tilt resolution between these adjacent bins.
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 15 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 15 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 13, 2026, 12:57 AM ET
Volume
$2,818End Date
Aug 15, 2026Market Opened
Aug 13, 2026, 12:57 AM 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 15 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, ECMWF, and Met Office converge on a daytime maximum of 20–22 °C for Helsinki on 15 August, placing the market’s tightly matched 22 °C (35.5 %) and 23 °C (34.0 %) outcomes at the center of current trader consensus. Mid-August climatology features declining solar angles and increasing Atlantic maritime influence that typically caps highs near 20 °C; however, small differences in predicted cloud cover, boundary-layer mixing, and 850 hPa temperatures can shift the peak by 1–2 °C. Light precipitation signals in some runs may further suppress insolation, while clearer scenarios allow brief warming toward 23 °C. Updated model runs and FMI nowcasts over the next 48 hours remain the key variables that could tilt resolution between these adjacent bins.
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 15 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 15 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
$2,818End Date
Aug 15, 2026Market Opened
Aug 13, 2026, 12:57 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Recent ensemble forecasts from the Finnish Meteorological Institute, ECMWF, and Met Office converge on a daytime maximum of 20–22 °C for Helsinki on 15 August, placing the market’s tightly matched 22 °C (35.5 %) and 23 °C (34.0 %) outcomes at the center of current trader consensus. Mid-August climatology features declining solar angles and increasing Atlantic maritime influence that typically caps highs near 20 °C; however, small differences in predicted cloud cover, boundary-layer mixing, and 850 hPa temperatures can shift the peak by 1–2 °C. Light precipitation signals in some runs may further suppress insolation, while clearer scenarios allow brief warming toward 23 °C. Updated model runs and FMI nowcasts over the next 48 hours remain the key variables that could tilt resolution between these adjacent bins.
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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