Recent forecasts from multiple models show Helsinki under persistent southwesterly flow and extensive cloud cover on September 9, with daytime highs most likely reaching 16–18 °C amid light rain chances that limit solar heating. This maritime air mass and lack of clear anticyclonic subsidence explain why traders assign nearly equal implied probabilities to 17 °C (39 %) and 18 °C (34.5 %), while assigning lower weight to 16 °C (18 %). The Baltic Sea’s thermal inertia and typical early-September climatology—average highs near 16.5 °C—further anchor expectations, with any brief clearing or stronger advection offering the main upside risk for 19 °C or above. Updated model runs and local observations over the next 48 hours will refine the precise peak before 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 9?
Highest temperature in Helsinki on September 9?
17°C 39%
18°C 35%
16°C 18%
19°C 7%
NEW
NEW
Sep 9, 2026
11°C or below
<1%
12°C
<1%
13°C
3%
14°C
2%
15°C
4%
16°C
18%
17°C
39%
18°C
35%
19°C
7%
20°C
3%
21°C or higher
2%
17°C 39%
18°C 35%
16°C 18%
19°C 7%
NEW
NEW
Sep 9, 2026
11°C or below
$271 Vol.
<1%
12°C
$271 Vol.
<1%
13°C
$0 Vol.
3%
14°C
$145 Vol.
2%
15°C
$77 Vol.
4%
16°C
$635 Vol.
18%
17°C
$289 Vol.
39%
18°C
$292 Vol.
35%
19°C
$376 Vol.
7%
20°C
$75 Vol.
3%
21°C or higher
$121 Vol.
2%
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 9 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 multiple models show Helsinki under persistent southwesterly flow and extensive cloud cover on September 9, with daytime highs most likely reaching 16–18 °C amid light rain chances that limit solar heating. This maritime air mass and lack of clear anticyclonic subsidence explain why traders assign nearly equal implied probabilities to 17 °C (39 %) and 18 °C (34.5 %), while assigning lower weight to 16 °C (18 %). The Baltic Sea’s thermal inertia and typical early-September climatology—average highs near 16.5 °C—further anchor expectations, with any brief clearing or stronger advection offering the main upside risk for 19 °C or above. Updated model runs and local observations over the next 48 hours will refine the precise peak before 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 9 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 7, 2026, 12:58 AM ET
Volume
$2,553End Date
Sep 9, 2026Market Opened
Sep 7, 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 9 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 multiple models show Helsinki under persistent southwesterly flow and extensive cloud cover on September 9, with daytime highs most likely reaching 16–18 °C amid light rain chances that limit solar heating. This maritime air mass and lack of clear anticyclonic subsidence explain why traders assign nearly equal implied probabilities to 17 °C (39 %) and 18 °C (34.5 %), while assigning lower weight to 16 °C (18 %). The Baltic Sea’s thermal inertia and typical early-September climatology—average highs near 16.5 °C—further anchor expectations, with any brief clearing or stronger advection offering the main upside risk for 19 °C or above. Updated model runs and local observations over the next 48 hours will refine the precise peak before 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 9 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
$2,553End Date
Sep 9, 2026Market Opened
Sep 7, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Recent forecasts from multiple models show Helsinki under persistent southwesterly flow and extensive cloud cover on September 9, with daytime highs most likely reaching 16–18 °C amid light rain chances that limit solar heating. This maritime air mass and lack of clear anticyclonic subsidence explain why traders assign nearly equal implied probabilities to 17 °C (39 %) and 18 °C (34.5 %), while assigning lower weight to 16 °C (18 %). The Baltic Sea’s thermal inertia and typical early-September climatology—average highs near 16.5 °C—further anchor expectations, with any brief clearing or stronger advection offering the main upside risk for 19 °C or above. Updated model runs and local observations over the next 48 hours will refine the precise peak before 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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