Recent forecasts from the Finnish Meteorological Institute and ensemble models indicate a highest temperature near 16–17°C in Helsinki on September 20, driven by southwesterly flow ahead of an approaching low-pressure system that limits daytime warming while maintaining mild maritime air. Seasonal norms for mid-September hover around 14–15°C, and current conditions show no strong warm anomaly or blocking high to push readings to 18°C or above. Scattered showers and moderate winds of 10–14 m/s further cap peaks, consistent with trader emphasis on the 17°C outcome. Updated model runs and official briefings in the next 48 hours will refine the exact maximum ahead of market 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 20?
Highest temperature in Helsinki on September 20?
17°C 59%
16°C 34%
15°C 9%
14°C 7%
NEW
NEW
Sep 20, 2026
11°C or below
<1%
12°C
2%
13°C
4%
14°C
7%
15°C
9%
16°C
34%
17°C
59%
18°C
6%
19°C
6%
20°C
5%
21°C or higher
<1%
17°C 59%
16°C 34%
15°C 9%
14°C 7%
NEW
NEW
Sep 20, 2026
11°C or below
$20 Vol.
<1%
12°C
$34 Vol.
2%
13°C
$0 Vol.
4%
14°C
$8 Vol.
7%
15°C
$20 Vol.
9%
16°C
$20 Vol.
34%
17°C
$219 Vol.
59%
18°C
$20 Vol.
6%
19°C
$0 Vol.
6%
20°C
$0 Vol.
5%
21°C or higher
$20 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 20 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 forecasts from the Finnish Meteorological Institute and ensemble models indicate a highest temperature near 16–17°C in Helsinki on September 20, driven by southwesterly flow ahead of an approaching low-pressure system that limits daytime warming while maintaining mild maritime air. Seasonal norms for mid-September hover around 14–15°C, and current conditions show no strong warm anomaly or blocking high to push readings to 18°C or above. Scattered showers and moderate winds of 10–14 m/s further cap peaks, consistent with trader emphasis on the 17°C outcome. Updated model runs and official briefings in the next 48 hours will refine the exact maximum ahead of market 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 20 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 18, 2026, 12:58 AM ET
Volume
$361End Date
Sep 20, 2026Market Opened
Sep 18, 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 20 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 forecasts from the Finnish Meteorological Institute and ensemble models indicate a highest temperature near 16–17°C in Helsinki on September 20, driven by southwesterly flow ahead of an approaching low-pressure system that limits daytime warming while maintaining mild maritime air. Seasonal norms for mid-September hover around 14–15°C, and current conditions show no strong warm anomaly or blocking high to push readings to 18°C or above. Scattered showers and moderate winds of 10–14 m/s further cap peaks, consistent with trader emphasis on the 17°C outcome. Updated model runs and official briefings in the next 48 hours will refine the exact maximum ahead of market 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 20 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
$361End Date
Sep 20, 2026Market Opened
Sep 18, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Recent forecasts from the Finnish Meteorological Institute and ensemble models indicate a highest temperature near 16–17°C in Helsinki on September 20, driven by southwesterly flow ahead of an approaching low-pressure system that limits daytime warming while maintaining mild maritime air. Seasonal norms for mid-September hover around 14–15°C, and current conditions show no strong warm anomaly or blocking high to push readings to 18°C or above. Scattered showers and moderate winds of 10–14 m/s further cap peaks, consistent with trader emphasis on the 17°C outcome. Updated model runs and official briefings in the next 48 hours will refine the exact maximum ahead of market 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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