Recent model consensus from sources including the Finnish Meteorological Institute and GFS runs points to a highest temperature in Helsinki on September 25 most likely between 13–15 °C, with northerly winds of 7–12 m/s, persistent cloud cover, and scattered showers expected to limit daytime warming. This setup aligns closely with the long-term average high of 13.6 °C while suppressing potential for stronger insolation or warmer southerly flow. Trader probabilities remain tightly clustered because small shifts in cloud timing, precipitation intensity, or wind direction—common variables this far ahead—could easily move the daily maximum by 1–2 °C in either direction. Updated short-range model guidance and observational data over the next 48 hours will provide the clearest signals for refining these outcomes.
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 25?
Highest temperature in Helsinki on September 25?
11°C 28%
13°C 27%
14°C 24%
12°C 21%
NEW
NEW
Sep 25, 2026
8°C or below
<1%
9°C
5%
10°C
6%
11°C
28%
12°C
21%
13°C
27%
14°C
24%
15°C
10%
16°C
10%
17°C
6%
18°C or higher
<1%
11°C 28%
13°C 27%
14°C 24%
12°C 21%
NEW
NEW
Sep 25, 2026
8°C or below
$0 Vol.
<1%
9°C
$0 Vol.
5%
10°C
$0 Vol.
6%
11°C
$0 Vol.
28%
12°C
$0 Vol.
21%
13°C
$0 Vol.
27%
14°C
$0 Vol.
24%
15°C
$0 Vol.
10%
16°C
$0 Vol.
10%
17°C
$0 Vol.
6%
18°C or higher
$0 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 25 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 model consensus from sources including the Finnish Meteorological Institute and GFS runs points to a highest temperature in Helsinki on September 25 most likely between 13–15 °C, with northerly winds of 7–12 m/s, persistent cloud cover, and scattered showers expected to limit daytime warming. This setup aligns closely with the long-term average high of 13.6 °C while suppressing potential for stronger insolation or warmer southerly flow. Trader probabilities remain tightly clustered because small shifts in cloud timing, precipitation intensity, or wind direction—common variables this far ahead—could easily move the daily maximum by 1–2 °C in either direction. Updated short-range model guidance and observational data over the next 48 hours will provide the clearest signals for refining these outcomes.
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 25 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 23, 2026, 12:58 AM ET
Volume
$0End Date
Sep 25, 2026Market Opened
Sep 23, 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 25 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 model consensus from sources including the Finnish Meteorological Institute and GFS runs points to a highest temperature in Helsinki on September 25 most likely between 13–15 °C, with northerly winds of 7–12 m/s, persistent cloud cover, and scattered showers expected to limit daytime warming. This setup aligns closely with the long-term average high of 13.6 °C while suppressing potential for stronger insolation or warmer southerly flow. Trader probabilities remain tightly clustered because small shifts in cloud timing, precipitation intensity, or wind direction—common variables this far ahead—could easily move the daily maximum by 1–2 °C in either direction. Updated short-range model guidance and observational data over the next 48 hours will provide the clearest signals for refining these outcomes.
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 25 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
$0End Date
Sep 25, 2026Market Opened
Sep 23, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Recent model consensus from sources including the Finnish Meteorological Institute and GFS runs points to a highest temperature in Helsinki on September 25 most likely between 13–15 °C, with northerly winds of 7–12 m/s, persistent cloud cover, and scattered showers expected to limit daytime warming. This setup aligns closely with the long-term average high of 13.6 °C while suppressing potential for stronger insolation or warmer southerly flow. Trader probabilities remain tightly clustered because small shifts in cloud timing, precipitation intensity, or wind direction—common variables this far ahead—could easily move the daily maximum by 1–2 °C in either direction. Updated short-range model guidance and observational data over the next 48 hours will provide the clearest signals for refining these outcomes.
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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