**Forecast models from sources including GFS data and European meteorological services indicate a daily maximum of 18°C as the most probable outcome for Helsinki on September 5, 2026.** Afternoon temperatures are projected to peak near 18°C under mostly cloudy skies with light winds under 10 km/h and negligible precipitation risk, consistent with hourly trends showing stabilization in the mid-afternoon. This aligns with the market's heavy weighting toward 18°C (62% implied probability), while the secondary chance for 17°C (25.5%) reflects minor model spread or localized cooling effects. A modest 9.5% probability for 19°C accounts for slight upside potential if solar heating exceeds expectations. September climatology places the long-term average high near 15–16°C, so current conditions represent a modest positive anomaly driven by transient high pressure and southerly flow, with no major shifts expected before 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 5?
Highest temperature in Helsinki on September 5?
18°C 61%
17°C 23%
19°C 12%
16°C <1%
NEW
$11,525 Vol.
NEW
$11,525 Vol.
Sep 5, 2026
13°C or below
<1%
14°C
<1%
15°C
<1%
16°C
1%
17°C
23%
18°C
61%
19°C
12%
20°C
<1%
21°C
<1%
22°C
<1%
23°C or higher
<1%
18°C 61%
17°C 23%
19°C 12%
16°C <1%
NEW
$11,525 Vol.
NEW
$11,525 Vol.
Sep 5, 2026
13°C or below
$305 Vol.
<1%
14°C
$229 Vol.
<1%
15°C
$259 Vol.
<1%
16°C
$769 Vol.
1%
17°C
$3,011 Vol.
23%
18°C
$3,359 Vol.
61%
19°C
$1,385 Vol.
12%
20°C
$869 Vol.
<1%
21°C
$568 Vol.
<1%
22°C
$625 Vol.
<1%
23°C or higher
$145 Vol.
<1%
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 5 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.**Forecast models from sources including GFS data and European meteorological services indicate a daily maximum of 18°C as the most probable outcome for Helsinki on September 5, 2026.** Afternoon temperatures are projected to peak near 18°C under mostly cloudy skies with light winds under 10 km/h and negligible precipitation risk, consistent with hourly trends showing stabilization in the mid-afternoon. This aligns with the market's heavy weighting toward 18°C (62% implied probability), while the secondary chance for 17°C (25.5%) reflects minor model spread or localized cooling effects. A modest 9.5% probability for 19°C accounts for slight upside potential if solar heating exceeds expectations. September climatology places the long-term average high near 15–16°C, so current conditions represent a modest positive anomaly driven by transient high pressure and southerly flow, with no major shifts expected before 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 5 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 3, 2026, 12:58 AM ET
Volume
$11,525End Date
Sep 5, 2026Market Opened
Sep 3, 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 5 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.**Forecast models from sources including GFS data and European meteorological services indicate a daily maximum of 18°C as the most probable outcome for Helsinki on September 5, 2026.** Afternoon temperatures are projected to peak near 18°C under mostly cloudy skies with light winds under 10 km/h and negligible precipitation risk, consistent with hourly trends showing stabilization in the mid-afternoon. This aligns with the market's heavy weighting toward 18°C (62% implied probability), while the secondary chance for 17°C (25.5%) reflects minor model spread or localized cooling effects. A modest 9.5% probability for 19°C accounts for slight upside potential if solar heating exceeds expectations. September climatology places the long-term average high near 15–16°C, so current conditions represent a modest positive anomaly driven by transient high pressure and southerly flow, with no major shifts expected before 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 5 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
$11,525End Date
Sep 5, 2026Market Opened
Sep 3, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...**Forecast models from sources including GFS data and European meteorological services indicate a daily maximum of 18°C as the most probable outcome for Helsinki on September 5, 2026.** Afternoon temperatures are projected to peak near 18°C under mostly cloudy skies with light winds under 10 km/h and negligible precipitation risk, consistent with hourly trends showing stabilization in the mid-afternoon. This aligns with the market's heavy weighting toward 18°C (62% implied probability), while the secondary chance for 17°C (25.5%) reflects minor model spread or localized cooling effects. A modest 9.5% probability for 19°C accounts for slight upside potential if solar heating exceeds expectations. September climatology places the long-term average high near 15–16°C, so current conditions represent a modest positive anomaly driven by transient high pressure and southerly flow, with no major shifts expected before resolution.
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