Recent numerical weather prediction models from the Finnish Meteorological Institute and international centers indicate a stable consensus for a daily maximum near 20–22°C at Helsinki-Vantaa Airport on August 17, 2026, under partly cloudy skies with moderate southwesterly winds and minimal precipitation risk. This tight ensemble spread and alignment with late-summer climatology—where typical August highs average 18–20°C—underpin the market-implied certainty around 22°C. Official observations through the afternoon, reaching 21°C, further reinforce this positioning with limited upside potential. Scenarios that could challenge the outcome include an unexpected warm advection or model bias allowing a brief spike above 22°C before sunset, though current data and resolution criteria tied to verified maximums make such shifts improbable.
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 17?
Highest temperature in Helsinki on August 17?
22°C 100.0%
15°C or below <1%
16°C <1%
17°C <1%
$42,441 Vol.
$42,441 Vol.
Aug 17, 2026
15°C or below
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
Yes
23°C
No
24°C
No
25°C or higher
No
22°C 100.0%
15°C or below <1%
16°C <1%
17°C <1%
$42,441 Vol.
$42,441 Vol.
Aug 17, 2026
15°C or below
$1,714 Vol.
No
16°C
$525 Vol.
No
17°C
$697 Vol.
No
18°C
$3,304 Vol.
No
19°C
$4,443 Vol.
No
20°C
$6,273 Vol.
No
21°C
$13,845 Vol.
No
22°C
$7,794 Vol.
Yes
23°C
$3,026 Vol.
No
24°C
$685 Vol.
No
25°C or higher
$135 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 17 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 numerical weather prediction models from the Finnish Meteorological Institute and international centers indicate a stable consensus for a daily maximum near 20–22°C at Helsinki-Vantaa Airport on August 17, 2026, under partly cloudy skies with moderate southwesterly winds and minimal precipitation risk. This tight ensemble spread and alignment with late-summer climatology—where typical August highs average 18–20°C—underpin the market-implied certainty around 22°C. Official observations through the afternoon, reaching 21°C, further reinforce this positioning with limited upside potential. Scenarios that could challenge the outcome include an unexpected warm advection or model bias allowing a brief spike above 22°C before sunset, though current data and resolution criteria tied to verified maximums make such shifts improbable.
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 17 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 17 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 15, 2026, 4:07 PM ET
Volume
$42,441End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 4:07 PM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: 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 17 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 numerical weather prediction models from the Finnish Meteorological Institute and international centers indicate a stable consensus for a daily maximum near 20–22°C at Helsinki-Vantaa Airport on August 17, 2026, under partly cloudy skies with moderate southwesterly winds and minimal precipitation risk. This tight ensemble spread and alignment with late-summer climatology—where typical August highs average 18–20°C—underpin the market-implied certainty around 22°C. Official observations through the afternoon, reaching 21°C, further reinforce this positioning with limited upside potential. Scenarios that could challenge the outcome include an unexpected warm advection or model bias allowing a brief spike above 22°C before sunset, though current data and resolution criteria tied to verified maximums make such shifts improbable.
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 17 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 17 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
$42,441End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 4:07 PM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent numerical weather prediction models from the Finnish Meteorological Institute and international centers indicate a stable consensus for a daily maximum near 20–22°C at Helsinki-Vantaa Airport on August 17, 2026, under partly cloudy skies with moderate southwesterly winds and minimal precipitation risk. This tight ensemble spread and alignment with late-summer climatology—where typical August highs average 18–20°C—underpin the market-implied certainty around 22°C. Official observations through the afternoon, reaching 21°C, further reinforce this positioning with limited upside potential. Scenarios that could challenge the outcome include an unexpected warm advection or model bias allowing a brief spike above 22°C before sunset, though current data and resolution criteria tied to verified maximums make such shifts improbable.
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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