Trader consensus at near-certainty for a 23°C high in Helsinki on August 15 reflects final official observations from the Finnish Meteorological Institute confirming that peak value under persistent high pressure and southerly flow of moderate air masses. Ensemble forecasts from European models aligned closely with this outcome in the days leading up to resolution, consistent with typical late-summer climatology where daily maxima in the region average near 18–20°C but can reach the low 20s during stable anticyclonic conditions. Limited model spread and absence of unexpected frontal systems or cloud cover reduced uncertainty, though minor revisions in post-event data validation could still theoretically shift the recorded maximum by 1°C.
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?
23°C 100.0%
17°C or below <1%
18°C <1%
19°C <1%
$42,226 Vol.
$42,226 Vol.
Aug 15, 2026
17°C or below
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
No
23°C
Yes
24°C
No
25°C
No
26°C
No
27°C or higher
No
23°C 100.0%
17°C or below <1%
18°C <1%
19°C <1%
$42,226 Vol.
$42,226 Vol.
Aug 15, 2026
17°C or below
$2,873 Vol.
No
18°C
$1,072 Vol.
No
19°C
$3,424 Vol.
No
20°C
$4,047 Vol.
No
21°C
$2,778 Vol.
No
22°C
$8,412 Vol.
No
23°C
$7,233 Vol.
Yes
24°C
$5,852 Vol.
No
25°C
$5,278 Vol.
No
26°C
$618 Vol.
No
27°C or higher
$638 Vol.
No
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.Trader consensus at near-certainty for a 23°C high in Helsinki on August 15 reflects final official observations from the Finnish Meteorological Institute confirming that peak value under persistent high pressure and southerly flow of moderate air masses. Ensemble forecasts from European models aligned closely with this outcome in the days leading up to resolution, consistent with typical late-summer climatology where daily maxima in the region average near 18–20°C but can reach the low 20s during stable anticyclonic conditions. Limited model spread and absence of unexpected frontal systems or cloud cover reduced uncertainty, though minor revisions in post-event data validation could still theoretically shift the recorded maximum by 1°C.
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
$42,226End Date
Aug 15, 2026Market Opened
Aug 13, 2026, 12:57 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
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.Trader consensus at near-certainty for a 23°C high in Helsinki on August 15 reflects final official observations from the Finnish Meteorological Institute confirming that peak value under persistent high pressure and southerly flow of moderate air masses. Ensemble forecasts from European models aligned closely with this outcome in the days leading up to resolution, consistent with typical late-summer climatology where daily maxima in the region average near 18–20°C but can reach the low 20s during stable anticyclonic conditions. Limited model spread and absence of unexpected frontal systems or cloud cover reduced uncertainty, though minor revisions in post-event data validation could still theoretically shift the recorded maximum by 1°C.
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
$42,226End Date
Aug 15, 2026Market Opened
Aug 13, 2026, 12:57 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
Trader consensus at near-certainty for a 23°C high in Helsinki on August 15 reflects final official observations from the Finnish Meteorological Institute confirming that peak value under persistent high pressure and southerly flow of moderate air masses. Ensemble forecasts from European models aligned closely with this outcome in the days leading up to resolution, consistent with typical late-summer climatology where daily maxima in the region average near 18–20°C but can reach the low 20s during stable anticyclonic conditions. Limited model spread and absence of unexpected frontal systems or cloud cover reduced uncertainty, though minor revisions in post-event data validation could still theoretically shift the recorded maximum by 1°C.
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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