Recent forecasts for Helsinki indicate a daily minimum likely between 9–13°C under southwesterly flow, variable cloud cover, and scattered showers, keeping trader-implied odds tightly clustered around those thresholds. Mild Atlantic air advection and limited radiational cooling from persistent clouds and winds above 5–8 m/s suppress sharper drops, while any brief clear intervals overnight could allow temperatures to approach the lower end of the range. September 2026 has run slightly above the 12.3°C monthly normal so far, but today’s GFS and local model runs show modest spread tied to exact timing of precipitation and wind shifts. Official observations from FMI stations will resolve the market once the 24-hour minimum is confirmed.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Helsinki on September 20?
Lowest temperature in Helsinki on September 20?
9°C 49%
13°C 49%
11°C 47%
10°C 47%
NEW
NEW
Sep 20, 2026
6°C or below
<1%
7°C
8%
8°C
10%
9°C
49%
10°C
47%
11°C
47%
12°C
47%
13°C
49%
14°C
<1%
15°C
<1%
16°C or higher
<1%
9°C 49%
13°C 49%
11°C 47%
10°C 47%
NEW
NEW
Sep 20, 2026
6°C or below
$31 Vol.
<1%
7°C
$0 Vol.
8%
8°C
$0 Vol.
10%
9°C
$0 Vol.
49%
10°C
$0 Vol.
47%
11°C
$0 Vol.
47%
12°C
$98 Vol.
47%
13°C
$0 Vol.
49%
14°C
$77 Vol.
<1%
15°C
$216 Vol.
<1%
16°C or higher
$37 Vol.
<1%
This market will resolve to the temperature range that contains the lowest 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 lowest 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 for Helsinki indicate a daily minimum likely between 9–13°C under southwesterly flow, variable cloud cover, and scattered showers, keeping trader-implied odds tightly clustered around those thresholds. Mild Atlantic air advection and limited radiational cooling from persistent clouds and winds above 5–8 m/s suppress sharper drops, while any brief clear intervals overnight could allow temperatures to approach the lower end of the range. September 2026 has run slightly above the 12.3°C monthly normal so far, but today’s GFS and local model runs show modest spread tied to exact timing of precipitation and wind shifts. Official observations from FMI stations will resolve the market once the 24-hour minimum is confirmed.
This market will resolve to the temperature range that contains the lowest 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 lowest 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 lowest 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, 12:31 AM ET
Volume
$459End Date
Sep 20, 2026Market Opened
Sep 18, 2026, 12:31 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest 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 lowest 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 for Helsinki indicate a daily minimum likely between 9–13°C under southwesterly flow, variable cloud cover, and scattered showers, keeping trader-implied odds tightly clustered around those thresholds. Mild Atlantic air advection and limited radiational cooling from persistent clouds and winds above 5–8 m/s suppress sharper drops, while any brief clear intervals overnight could allow temperatures to approach the lower end of the range. September 2026 has run slightly above the 12.3°C monthly normal so far, but today’s GFS and local model runs show modest spread tied to exact timing of precipitation and wind shifts. Official observations from FMI stations will resolve the market once the 24-hour minimum is confirmed.
This market will resolve to the temperature range that contains the lowest 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 lowest 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 lowest 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
$459End Date
Sep 20, 2026Market Opened
Sep 18, 2026, 12:31 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Recent forecasts for Helsinki indicate a daily minimum likely between 9–13°C under southwesterly flow, variable cloud cover, and scattered showers, keeping trader-implied odds tightly clustered around those thresholds. Mild Atlantic air advection and limited radiational cooling from persistent clouds and winds above 5–8 m/s suppress sharper drops, while any brief clear intervals overnight could allow temperatures to approach the lower end of the range. September 2026 has run slightly above the 12.3°C monthly normal so far, but today’s GFS and local model runs show modest spread tied to exact timing of precipitation and wind shifts. Official observations from FMI stations will resolve the market once the 24-hour minimum is confirmed.
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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