**Trader consensus has locked in 18°C as the highest temperature recorded in Helsinki on August 20, 2026, with near-certain market-implied odds reflecting verified observational data.** Official monitoring from the Finnish Meteorological Institute and airport stations shows a daily maximum of 18°C under persistent overcast skies, light drizzle, and moderate easterly winds that limited daytime heating. This outcome aligns with the day’s cooler-than-average conditions—well below the long-term August high near 20°C—driven by regional cloud cover and limited solar insolation. Real-time reports consistently peaked at or near 17–18°C in the afternoon before temperatures fell through the evening. While measurement revisions or station-specific readings could theoretically shift the final official value, the convergence of multiple sources makes meaningful deviation unlikely at this stage.
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 20?
Highest temperature in Helsinki on August 20?
18°C 100.0%
14°C or below <1%
15°C <1%
16°C <1%
$61,714 Vol.
$61,714 Vol.
Aug 20, 2026
14°C or below
No
15°C
No
16°C
No
17°C
No
18°C
Yes
19°C
No
20°C
No
21°C
No
22°C
No
23°C
No
24°C or higher
No
18°C 100.0%
14°C or below <1%
15°C <1%
16°C <1%
$61,714 Vol.
$61,714 Vol.
Aug 20, 2026
14°C or below
$3,456 Vol.
No
15°C
$7,271 Vol.
No
16°C
$5,921 Vol.
No
17°C
$7,147 Vol.
No
18°C
$16,746 Vol.
Yes
19°C
$9,499 Vol.
No
20°C
$6,683 Vol.
No
21°C
$2,753 Vol.
No
22°C
$1,189 Vol.
No
23°C
$551 Vol.
No
24°C or higher
$498 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 20 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 has locked in 18°C as the highest temperature recorded in Helsinki on August 20, 2026, with near-certain market-implied odds reflecting verified observational data.**
Official monitoring from the Finnish Meteorological Institute and airport stations shows a daily maximum of 18°C under persistent overcast skies, light drizzle, and moderate easterly winds that limited daytime heating. This outcome aligns with the day’s cooler-than-average conditions—well below the long-term August high near 20°C—driven by regional cloud cover and limited solar insolation. Real-time reports consistently peaked at or near 17–18°C in the afternoon before temperatures fell through the evening.
While measurement revisions or station-specific readings could theoretically shift the final official value, the convergence of multiple sources makes meaningful deviation unlikely at this stage.
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 20 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 20 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 18, 2026, 12:58 AM ET
Volume
$61,714End Date
Aug 20, 2026Market Opened
Aug 18, 2026, 12:58 AM 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 20 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 has locked in 18°C as the highest temperature recorded in Helsinki on August 20, 2026, with near-certain market-implied odds reflecting verified observational data.**
Official monitoring from the Finnish Meteorological Institute and airport stations shows a daily maximum of 18°C under persistent overcast skies, light drizzle, and moderate easterly winds that limited daytime heating. This outcome aligns with the day’s cooler-than-average conditions—well below the long-term August high near 20°C—driven by regional cloud cover and limited solar insolation. Real-time reports consistently peaked at or near 17–18°C in the afternoon before temperatures fell through the evening.
While measurement revisions or station-specific readings could theoretically shift the final official value, the convergence of multiple sources makes meaningful deviation unlikely at this stage.
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 20 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 20 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
$61,714End Date
Aug 20, 2026Market Opened
Aug 18, 2026, 12:58 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
**Trader consensus has locked in 18°C as the highest temperature recorded in Helsinki on August 20, 2026, with near-certain market-implied odds reflecting verified observational data.** Official monitoring from the Finnish Meteorological Institute and airport stations shows a daily maximum of 18°C under persistent overcast skies, light drizzle, and moderate easterly winds that limited daytime heating. This outcome aligns with the day’s cooler-than-average conditions—well below the long-term August high near 20°C—driven by regional cloud cover and limited solar insolation. Real-time reports consistently peaked at or near 17–18°C in the afternoon before temperatures fell through the evening. While measurement revisions or station-specific readings could theoretically shift the final official value, the convergence of multiple sources makes meaningful deviation unlikely at this stage.
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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