Recent forecasts from the Finnish Meteorological Institute and supporting models indicate a low around 14–15°C overnight into September 9 in Helsinki, driven by a passing low-pressure system with persistent cloud cover, light southwesterly winds, and scattered showers that limit radiative cooling. This places the expected minimum near the middle of the listed outcomes and explains why trader-implied probabilities for 9°C or below and 19°C or higher sit nearly even at roughly 49 percent each: small shifts in cloud thickness or wind speed could push the minimum a few degrees either way. Historical September averages near 10°C provide context, yet current synoptic patterns favor milder conditions with limited model spread through the 48-hour window. Updated runs and observational data from the coming hours will be the key inputs for any further adjustment in market-implied odds.
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 9?
9°C or below 98%
19°C or higher 98%
17°C 49%
18°C 49%
9°C or below
98%
10°C
48%
11°C
48%
12°C
48%
13°C
27%
14°C
48%
15°C
48%
16°C
48%
17°C
49%
18°C
49%
19°C or higher
98%
9°C or below 98%
19°C or higher 98%
17°C 49%
18°C 49%
9°C or below
98%
10°C
48%
11°C
48%
12°C
48%
13°C
27%
14°C
48%
15°C
48%
16°C
48%
17°C
49%
18°C
49%
19°C or higher
98%
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 7, 2026, 12:31 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Recent forecasts from the Finnish Meteorological Institute and supporting models indicate a low around 14–15°C overnight into September 9 in Helsinki, driven by a passing low-pressure system with persistent cloud cover, light southwesterly winds, and scattered showers that limit radiative cooling. This places the expected minimum near the middle of the listed outcomes and explains why trader-implied probabilities for 9°C or below and 19°C or higher sit nearly even at roughly 49 percent each: small shifts in cloud thickness or wind speed could push the minimum a few degrees either way. Historical September averages near 10°C provide context, yet current synoptic patterns favor milder conditions with limited model spread through the 48-hour window. Updated runs and observational data from the coming hours will be the key inputs for any further adjustment in market-implied odds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions