Recent observational data from the Finnish Meteorological Institute and Helsinki-area stations indicate a daytime maximum of 17°C on September 17, 2026, under partly cloudy skies with southwesterly flow and light precipitation. This aligns closely with the 1991–2020 climatological average high of 15.1°C while falling short of recent warm analogs such as 19.1°C in 2024. Model consensus from GFS and local guidance converged on this value by midday, with minimal spread in temperature forecasts and no significant warm advection or clear-sky insolation to push readings higher. The market’s near-certain 17°C outcome reflects this tight observational agreement and the proximity to daily resolution. A late upward revision in verified station data or an undetected microscale warming event remains the primary, albeit low-probability, scenario that could alter the outcome.
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 17?
Highest temperature in Helsinki on September 17?
17°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$31,724 Vol.
$31,724 Vol.
Sep 17, 2026
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
Yes
18°C
No
19°C
No
20°C
No
21°C or higher
No
17°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$31,724 Vol.
$31,724 Vol.
Sep 17, 2026
11°C or below
$491 Vol.
No
12°C
$1,002 Vol.
No
13°C
$713 Vol.
No
14°C
$2,683 Vol.
No
15°C
$1,965 Vol.
No
16°C
$8,472 Vol.
No
17°C
$7,447 Vol.
Yes
18°C
$4,486 Vol.
No
19°C
$2,297 Vol.
No
20°C
$1,681 Vol.
No
21°C or higher
$486 Vol.
No
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 17 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 observational data from the Finnish Meteorological Institute and Helsinki-area stations indicate a daytime maximum of 17°C on September 17, 2026, under partly cloudy skies with southwesterly flow and light precipitation. This aligns closely with the 1991–2020 climatological average high of 15.1°C while falling short of recent warm analogs such as 19.1°C in 2024. Model consensus from GFS and local guidance converged on this value by midday, with minimal spread in temperature forecasts and no significant warm advection or clear-sky insolation to push readings higher. The market’s near-certain 17°C outcome reflects this tight observational agreement and the proximity to daily resolution. A late upward revision in verified station data or an undetected microscale warming event remains the primary, albeit low-probability, scenario that could alter the outcome.
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 17 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 15, 2026, 12:58 AM ET
Volume
$31,724End Date
Sep 17, 2026Market Opened
Sep 15, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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 17 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 observational data from the Finnish Meteorological Institute and Helsinki-area stations indicate a daytime maximum of 17°C on September 17, 2026, under partly cloudy skies with southwesterly flow and light precipitation. This aligns closely with the 1991–2020 climatological average high of 15.1°C while falling short of recent warm analogs such as 19.1°C in 2024. Model consensus from GFS and local guidance converged on this value by midday, with minimal spread in temperature forecasts and no significant warm advection or clear-sky insolation to push readings higher. The market’s near-certain 17°C outcome reflects this tight observational agreement and the proximity to daily resolution. A late upward revision in verified station data or an undetected microscale warming event remains the primary, albeit low-probability, scenario that could alter the outcome.
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 17 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
$31,724End Date
Sep 17, 2026Market Opened
Sep 15, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent observational data from the Finnish Meteorological Institute and Helsinki-area stations indicate a daytime maximum of 17°C on September 17, 2026, under partly cloudy skies with southwesterly flow and light precipitation. This aligns closely with the 1991–2020 climatological average high of 15.1°C while falling short of recent warm analogs such as 19.1°C in 2024. Model consensus from GFS and local guidance converged on this value by midday, with minimal spread in temperature forecasts and no significant warm advection or clear-sky insolation to push readings higher. The market’s near-certain 17°C outcome reflects this tight observational agreement and the proximity to daily resolution. A late upward revision in verified station data or an undetected microscale warming event remains the primary, albeit low-probability, scenario that could alter the outcome.
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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