**Recent meteorological observations confirm a daytime maximum of 17°C in Helsinki on September 11, 2026, aligning with the market's near-certain outcome.** Official reports from Helsinki-Vantaa Airport and local stations recorded clear skies, light to moderate westerly winds, and temperatures peaking near 17°C during midday hours before cooling into the evening. This matches the long-term September 11 average high of approximately 16.2°C from 1991–2020 climatology, with no notable heat advection or blocking patterns altering the typical autumnal regime. Minor station-to-station variations or final data revisions could theoretically shift the verified high, but multiple independent sources converge on 17°C without evidence of higher readings.
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 11?
Highest temperature in Helsinki on September 11?
17°C 100.0%
10°C or below <1%
11°C <1%
12°C <1%
$21,768 Vol.
$21,768 Vol.
Sep 11, 2026
10°C or below
No
11°C
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 or higher
No
17°C 100.0%
10°C or below <1%
11°C <1%
12°C <1%
$21,768 Vol.
$21,768 Vol.
Sep 11, 2026
10°C or below
$275 Vol.
No
11°C
$141 Vol.
No
12°C
$391 Vol.
No
13°C
$266 Vol.
No
14°C
$237 Vol.
No
15°C
$894 Vol.
No
16°C
$4,112 Vol.
No
17°C
$9,345 Vol.
Yes
18°C
$4,969 Vol.
No
19°C
$973 Vol.
No
20°C or higher
$166 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 11 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 meteorological observations confirm a daytime maximum of 17°C in Helsinki on September 11, 2026, aligning with the market's near-certain outcome.** Official reports from Helsinki-Vantaa Airport and local stations recorded clear skies, light to moderate westerly winds, and temperatures peaking near 17°C during midday hours before cooling into the evening. This matches the long-term September 11 average high of approximately 16.2°C from 1991–2020 climatology, with no notable heat advection or blocking patterns altering the typical autumnal regime. Minor station-to-station variations or final data revisions could theoretically shift the verified high, but multiple independent sources converge on 17°C without evidence of higher readings.
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 11 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 9, 2026, 12:58 AM ET
Volume
$21,768End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 12:58 AM 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 11 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 meteorological observations confirm a daytime maximum of 17°C in Helsinki on September 11, 2026, aligning with the market's near-certain outcome.** Official reports from Helsinki-Vantaa Airport and local stations recorded clear skies, light to moderate westerly winds, and temperatures peaking near 17°C during midday hours before cooling into the evening. This matches the long-term September 11 average high of approximately 16.2°C from 1991–2020 climatology, with no notable heat advection or blocking patterns altering the typical autumnal regime. Minor station-to-station variations or final data revisions could theoretically shift the verified high, but multiple independent sources converge on 17°C without evidence of higher readings.
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 11 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
$21,768End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
**Recent meteorological observations confirm a daytime maximum of 17°C in Helsinki on September 11, 2026, aligning with the market's near-certain outcome.** Official reports from Helsinki-Vantaa Airport and local stations recorded clear skies, light to moderate westerly winds, and temperatures peaking near 17°C during midday hours before cooling into the evening. This matches the long-term September 11 average high of approximately 16.2°C from 1991–2020 climatology, with no notable heat advection or blocking patterns altering the typical autumnal regime. Minor station-to-station variations or final data revisions could theoretically shift the verified high, but multiple independent sources converge on 17°C without evidence of higher readings.
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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