Recent weather model runs, including GFS guidance and consensus from sources such as the Finnish Meteorological Institute, position Helsinki for a mild day on September 19 with southwesterly flow, widespread cloud cover, and periods of light rain limiting daytime heating. Forecast highs cluster tightly between 16°C and 17°C, consistent with climatological norms near 14–15°C but elevated by the current pattern. Traders have concentrated implied probability on these two outcomes because model spreads remain modest, with limited upside potential from clearer breaks or stronger advection and downside risk from heavier precipitation or timing of the daily peak. Updated short-range guidance over the next 12–24 hours will likely refine the exact maximum before resolution.
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 19?
Highest temperature in Helsinki on September 19?
17°C 63%
16°C 31%
18°C 7%
15°C 3%
NEW
NEW
Sep 19, 2026
11°C or below
<1%
12°C
<1%
13°C
<1%
14°C
1%
15°C
3%
16°C
31%
17°C
63%
18°C
7%
19°C
1%
20°C
<1%
21°C or higher
<1%
17°C 63%
16°C 31%
18°C 7%
15°C 3%
NEW
NEW
Sep 19, 2026
11°C or below
$309 Vol.
<1%
12°C
$329 Vol.
<1%
13°C
$109 Vol.
<1%
14°C
$371 Vol.
1%
15°C
$561 Vol.
3%
16°C
$2,752 Vol.
31%
17°C
$2,319 Vol.
63%
18°C
$675 Vol.
7%
19°C
$444 Vol.
1%
20°C
$267 Vol.
<1%
21°C or higher
$213 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 19 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 weather model runs, including GFS guidance and consensus from sources such as the Finnish Meteorological Institute, position Helsinki for a mild day on September 19 with southwesterly flow, widespread cloud cover, and periods of light rain limiting daytime heating. Forecast highs cluster tightly between 16°C and 17°C, consistent with climatological norms near 14–15°C but elevated by the current pattern. Traders have concentrated implied probability on these two outcomes because model spreads remain modest, with limited upside potential from clearer breaks or stronger advection and downside risk from heavier precipitation or timing of the daily peak. Updated short-range guidance over the next 12–24 hours will likely refine the exact maximum before resolution.
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 19 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 17, 2026, 12:58 AM ET
Volume
$8,349End Date
Sep 19, 2026Market Opened
Sep 17, 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 19 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 weather model runs, including GFS guidance and consensus from sources such as the Finnish Meteorological Institute, position Helsinki for a mild day on September 19 with southwesterly flow, widespread cloud cover, and periods of light rain limiting daytime heating. Forecast highs cluster tightly between 16°C and 17°C, consistent with climatological norms near 14–15°C but elevated by the current pattern. Traders have concentrated implied probability on these two outcomes because model spreads remain modest, with limited upside potential from clearer breaks or stronger advection and downside risk from heavier precipitation or timing of the daily peak. Updated short-range guidance over the next 12–24 hours will likely refine the exact maximum before resolution.
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 19 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
$8,349End Date
Sep 19, 2026Market Opened
Sep 17, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Recent weather model runs, including GFS guidance and consensus from sources such as the Finnish Meteorological Institute, position Helsinki for a mild day on September 19 with southwesterly flow, widespread cloud cover, and periods of light rain limiting daytime heating. Forecast highs cluster tightly between 16°C and 17°C, consistent with climatological norms near 14–15°C but elevated by the current pattern. Traders have concentrated implied probability on these two outcomes because model spreads remain modest, with limited upside potential from clearer breaks or stronger advection and downside risk from heavier precipitation or timing of the daily peak. Updated short-range guidance over the next 12–24 hours will likely refine the exact maximum before resolution.
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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