Current forecast consensus from Finnish Meteorological Institute and ECMWF ensembles positions Helsinki’s August 19 daily maximum near 19–21°C, driving the tight clustering of market-implied odds around 20–22°C. Late-August climatology features declining solar insolation and Baltic Sea moderation that typically caps highs near 19°C, while stable high pressure and light southerly flow support modest warming above seasonal norms without triggering stronger advection. Minor differences among leading outcomes reflect uncertainty in boundary-layer mixing, cloud cover timing, and sea-surface temperature feedbacks, with newer model runs expected to narrow the spread before resolution. Traders weigh this narrow ensemble range against historical variability in coastal maxima.
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 19?
Highest temperature in Helsinki on August 19?
21°C 29%
22°C 28%
20°C 24%
19°C 8%
NEW
NEW
Aug 19, 2026
16°C or below
1%
17°C
5%
18°C
6%
19°C
8%
20°C
24%
21°C
29%
22°C
28%
23°C
6%
24°C
6%
25°C
1%
26°C or higher
<1%
21°C 29%
22°C 28%
20°C 24%
19°C 8%
NEW
NEW
Aug 19, 2026
16°C or below
$5 Vol.
1%
17°C
$15 Vol.
5%
18°C
$1 Vol.
6%
19°C
$1 Vol.
8%
20°C
$1 Vol.
24%
21°C
$1 Vol.
29%
22°C
$25 Vol.
28%
23°C
$0 Vol.
6%
24°C
$15 Vol.
6%
25°C
$5 Vol.
1%
26°C or higher
$5 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 19 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.Current forecast consensus from Finnish Meteorological Institute and ECMWF ensembles positions Helsinki’s August 19 daily maximum near 19–21°C, driving the tight clustering of market-implied odds around 20–22°C. Late-August climatology features declining solar insolation and Baltic Sea moderation that typically caps highs near 19°C, while stable high pressure and light southerly flow support modest warming above seasonal norms without triggering stronger advection. Minor differences among leading outcomes reflect uncertainty in boundary-layer mixing, cloud cover timing, and sea-surface temperature feedbacks, with newer model runs expected to narrow the spread before resolution. Traders weigh this narrow ensemble range against historical variability in coastal maxima.
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 19 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 19 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 17, 2026, 12:58 AM ET
Volume
$75End Date
Aug 19, 2026Market Opened
Aug 17, 2026, 12:58 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 19 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.Current forecast consensus from Finnish Meteorological Institute and ECMWF ensembles positions Helsinki’s August 19 daily maximum near 19–21°C, driving the tight clustering of market-implied odds around 20–22°C. Late-August climatology features declining solar insolation and Baltic Sea moderation that typically caps highs near 19°C, while stable high pressure and light southerly flow support modest warming above seasonal norms without triggering stronger advection. Minor differences among leading outcomes reflect uncertainty in boundary-layer mixing, cloud cover timing, and sea-surface temperature feedbacks, with newer model runs expected to narrow the spread before resolution. Traders weigh this narrow ensemble range against historical variability in coastal maxima.
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 19 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 19 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
$75End Date
Aug 19, 2026Market Opened
Aug 17, 2026, 12:58 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Current forecast consensus from Finnish Meteorological Institute and ECMWF ensembles positions Helsinki’s August 19 daily maximum near 19–21°C, driving the tight clustering of market-implied odds around 20–22°C. Late-August climatology features declining solar insolation and Baltic Sea moderation that typically caps highs near 19°C, while stable high pressure and light southerly flow support modest warming above seasonal norms without triggering stronger advection. Minor differences among leading outcomes reflect uncertainty in boundary-layer mixing, cloud cover timing, and sea-surface temperature feedbacks, with newer model runs expected to narrow the spread before resolution. Traders weigh this narrow ensemble range against historical variability in coastal maxima.
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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