Recent forecast model consensus from the Finnish Meteorological Institute, GFS, and other guidance points to a daytime maximum near 16°C in Helsinki on September 21, driven by cooler northerly flow behind a weak frontal passage and partly cloudy conditions that limit strong insolation. This aligns with the market-implied odds favoring 16°C, while the secondary probability on 17°C reflects residual uncertainty in boundary-layer mixing and exact cloud cover. Afternoon temperatures are expected to peak under light winds before cooling overnight, consistent with early-autumn climatology where daily highs average about 14°C. Updated model runs and official observations tomorrow will determine the precise maximum recorded at the Helsinki station.
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 21?
Highest temperature in Helsinki on September 21?
16°C 45%
17°C 29%
15°C 19%
14°C 4%
NEW
NEW
Sep 21, 2026
10°C or below
<1%
11°C
<1%
12°C
1%
13°C
2%
14°C
4%
15°C
19%
16°C
45%
17°C
29%
18°C
4%
19°C
2%
20°C or higher
1%
16°C 45%
17°C 29%
15°C 19%
14°C 4%
NEW
NEW
Sep 21, 2026
10°C or below
$197 Vol.
<1%
11°C
$499 Vol.
<1%
12°C
$81 Vol.
1%
13°C
$31 Vol.
2%
14°C
$0 Vol.
4%
15°C
$327 Vol.
19%
16°C
$1,149 Vol.
45%
17°C
$485 Vol.
29%
18°C
$276 Vol.
4%
19°C
$62 Vol.
2%
20°C or higher
$181 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 21 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 forecast model consensus from the Finnish Meteorological Institute, GFS, and other guidance points to a daytime maximum near 16°C in Helsinki on September 21, driven by cooler northerly flow behind a weak frontal passage and partly cloudy conditions that limit strong insolation. This aligns with the market-implied odds favoring 16°C, while the secondary probability on 17°C reflects residual uncertainty in boundary-layer mixing and exact cloud cover. Afternoon temperatures are expected to peak under light winds before cooling overnight, consistent with early-autumn climatology where daily highs average about 14°C. Updated model runs and official observations tomorrow will determine the precise maximum recorded at the Helsinki station.
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 21 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 19, 2026, 12:58 AM ET
Volume
$3,289End Date
Sep 21, 2026Market Opened
Sep 19, 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 21 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 forecast model consensus from the Finnish Meteorological Institute, GFS, and other guidance points to a daytime maximum near 16°C in Helsinki on September 21, driven by cooler northerly flow behind a weak frontal passage and partly cloudy conditions that limit strong insolation. This aligns with the market-implied odds favoring 16°C, while the secondary probability on 17°C reflects residual uncertainty in boundary-layer mixing and exact cloud cover. Afternoon temperatures are expected to peak under light winds before cooling overnight, consistent with early-autumn climatology where daily highs average about 14°C. Updated model runs and official observations tomorrow will determine the precise maximum recorded at the Helsinki station.
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 21 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
$3,289End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Recent forecast model consensus from the Finnish Meteorological Institute, GFS, and other guidance points to a daytime maximum near 16°C in Helsinki on September 21, driven by cooler northerly flow behind a weak frontal passage and partly cloudy conditions that limit strong insolation. This aligns with the market-implied odds favoring 16°C, while the secondary probability on 17°C reflects residual uncertainty in boundary-layer mixing and exact cloud cover. Afternoon temperatures are expected to peak under light winds before cooling overnight, consistent with early-autumn climatology where daily highs average about 14°C. Updated model runs and official observations tomorrow will determine the precise maximum recorded at the Helsinki station.
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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