Recent numerical weather model consensus from the Finnish Meteorological Institute and supporting European forecasts points to a daytime high near 17°C in Helsinki on September 11, driven by northwest winds and partly cloudy skies that permit moderate solar heating without strong advection of warmer air. This aligns closely with the long-term average high of 16.2°C for the date while falling short of late-summer warmth seen in prior years. Stable model outputs over the past 48 hours, with minimal spread among runs, have reinforced trader confidence in the 17°C outcome at 68% implied probability, while the modest probabilities assigned to 16°C and 18°C reflect typical forecast uncertainty ranges of 1–2°C in mid-September conditions.
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 September 11?
Highest temperature in Helsinki on September 11?
17°C 68%
16°C 19%
18°C 11%
19°C 1.2%
NEW
NEW
Sep 11, 2026
10°C or below
<1%
11°C
<1%
12°C
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
19%
17°C
68%
18°C
11%
19°C
1%
20°C or higher
<1%
17°C 68%
16°C 19%
18°C 11%
19°C 1.2%
NEW
NEW
Sep 11, 2026
10°C or below
$275 Vol.
<1%
11°C
$141 Vol.
<1%
12°C
$391 Vol.
<1%
13°C
$266 Vol.
<1%
14°C
$225 Vol.
<1%
15°C
$712 Vol.
<1%
16°C
$1,178 Vol.
19%
17°C
$2,733 Vol.
68%
18°C
$1,962 Vol.
11%
19°C
$656 Vol.
1%
20°C or higher
$166 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 11 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 model consensus from the Finnish Meteorological Institute and supporting European forecasts points to a daytime high near 17°C in Helsinki on September 11, driven by northwest winds and partly cloudy skies that permit moderate solar heating without strong advection of warmer air. This aligns closely with the long-term average high of 16.2°C for the date while falling short of late-summer warmth seen in prior years. Stable model outputs over the past 48 hours, with minimal spread among runs, have reinforced trader confidence in the 17°C outcome at 68% implied probability, while the modest probabilities assigned to 16°C and 18°C reflect typical forecast uncertainty ranges of 1–2°C in mid-September conditions.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 11 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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: Sep 9, 2026, 12:58 AM ET
Volume
$8,703End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 11 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 model consensus from the Finnish Meteorological Institute and supporting European forecasts points to a daytime high near 17°C in Helsinki on September 11, driven by northwest winds and partly cloudy skies that permit moderate solar heating without strong advection of warmer air. This aligns closely with the long-term average high of 16.2°C for the date while falling short of late-summer warmth seen in prior years. Stable model outputs over the past 48 hours, with minimal spread among runs, have reinforced trader confidence in the 17°C outcome at 68% implied probability, while the modest probabilities assigned to 16°C and 18°C reflect typical forecast uncertainty ranges of 1–2°C in mid-September conditions.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Helsinki Vantaa Airport Station in degrees Celsius on 11 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=efhk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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
$8,703End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Recent numerical weather model consensus from the Finnish Meteorological Institute and supporting European forecasts points to a daytime high near 17°C in Helsinki on September 11, driven by northwest winds and partly cloudy skies that permit moderate solar heating without strong advection of warmer air. This aligns closely with the long-term average high of 16.2°C for the date while falling short of late-summer warmth seen in prior years. Stable model outputs over the past 48 hours, with minimal spread among runs, have reinforced trader confidence in the 17°C outcome at 68% implied probability, while the modest probabilities assigned to 16°C and 18°C reflect typical forecast uncertainty ranges of 1–2°C in mid-September conditions.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions