Recent observational data and short-range forecast models from the Finnish Meteorological Institute and international agencies indicate Helsinki's daytime maximum on September 15, 2026, will reach 17°C under mostly cloudy skies with light southerly flow. This aligns with climatological norms for mid-September, when average highs hover near 15.5°C, and matches recent model consensus projecting stable temperatures without significant advection of warmer air masses. Trader consensus at 100% implied probability for 17°C reflects high confidence in these verified readings near resolution. Outliers remain possible if official station measurements record a brief spike above 17°C or if localized cooling from increased cloud cover or precipitation lowers the peak, though current conditions make such shifts unlikely.
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 15?
Highest temperature in Helsinki on September 15?
17°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$30,626 Vol.
$30,626 Vol.
Sep 15, 2026
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
Yes
18°C
No
19°C
No
20°C
No
21°C or higher
No
17°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$30,626 Vol.
$30,626 Vol.
Sep 15, 2026
11°C or below
$1,432 Vol.
No
12°C
$898 Vol.
No
13°C
$808 Vol.
No
14°C
$1,384 Vol.
No
15°C
$4,283 Vol.
No
16°C
$9,357 Vol.
No
17°C
$9,305 Vol.
Yes
18°C
$2,753 Vol.
No
19°C
$181 Vol.
No
20°C
$38 Vol.
No
21°C or higher
$188 Vol.
No
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 15 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 observational data and short-range forecast models from the Finnish Meteorological Institute and international agencies indicate Helsinki's daytime maximum on September 15, 2026, will reach 17°C under mostly cloudy skies with light southerly flow. This aligns with climatological norms for mid-September, when average highs hover near 15.5°C, and matches recent model consensus projecting stable temperatures without significant advection of warmer air masses. Trader consensus at 100% implied probability for 17°C reflects high confidence in these verified readings near resolution. Outliers remain possible if official station measurements record a brief spike above 17°C or if localized cooling from increased cloud cover or precipitation lowers the peak, though current conditions make such shifts unlikely.
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 15 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 13, 2026, 12:59 PM ET
Volume
$30,626End Date
Sep 15, 2026Market Opened
Sep 13, 2026, 12:59 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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 15 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 observational data and short-range forecast models from the Finnish Meteorological Institute and international agencies indicate Helsinki's daytime maximum on September 15, 2026, will reach 17°C under mostly cloudy skies with light southerly flow. This aligns with climatological norms for mid-September, when average highs hover near 15.5°C, and matches recent model consensus projecting stable temperatures without significant advection of warmer air masses. Trader consensus at 100% implied probability for 17°C reflects high confidence in these verified readings near resolution. Outliers remain possible if official station measurements record a brief spike above 17°C or if localized cooling from increased cloud cover or precipitation lowers the peak, though current conditions make such shifts unlikely.
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 15 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
$30,626End Date
Sep 15, 2026Market Opened
Sep 13, 2026, 12:59 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent observational data and short-range forecast models from the Finnish Meteorological Institute and international agencies indicate Helsinki's daytime maximum on September 15, 2026, will reach 17°C under mostly cloudy skies with light southerly flow. This aligns with climatological norms for mid-September, when average highs hover near 15.5°C, and matches recent model consensus projecting stable temperatures without significant advection of warmer air masses. Trader consensus at 100% implied probability for 17°C reflects high confidence in these verified readings near resolution. Outliers remain possible if official station measurements record a brief spike above 17°C or if localized cooling from increased cloud cover or precipitation lowers the peak, though current conditions make such shifts unlikely.
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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