**Forecast consensus from multiple models points to a daily high of 15°C in Helsinki today, supported by persistent cloud cover, light rain, and moderate southwesterly winds averaging 7–10 m/s.** These conditions limit daytime warming over the Baltic Sea-influenced region, where typical mid-September highs average near 14–15°C. Hourly data show temperatures climbing from overnight lows around 11–12°C to afternoon peaks of 14–15°C, with high humidity near 90% and pressure around 1003 hPa. Traders assign 65% implied probability to 15°C and 31% to 16°C, reflecting model agreement on limited upside potential absent a sudden clearing trend. Updated observations through midday confirm readings near 14°C, keeping lower or higher outcomes at negligible odds.
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 18?
Highest temperature in Helsinki on September 18?
15°C 59%
16°C 41%
17°C 3%
9°C or below <1%
$22,909 Vol.
$22,909 Vol.
Sep 18, 2026
9°C or below
<1%
10°C
<1%
11°C
<1%
12°C
<1%
13°C
<1%
14°C
<1%
15°C
59%
16°C
41%
17°C
3%
18°C
<1%
19°C or higher
<1%
15°C 59%
16°C 41%
17°C 3%
9°C or below <1%
$22,909 Vol.
$22,909 Vol.
Sep 18, 2026
9°C or below
$495 Vol.
<1%
10°C
$474 Vol.
<1%
11°C
$673 Vol.
<1%
12°C
$614 Vol.
<1%
13°C
$1,200 Vol.
<1%
14°C
$3,523 Vol.
<1%
15°C
$6,414 Vol.
59%
16°C
$6,283 Vol.
41%
17°C
$2,644 Vol.
3%
18°C
$455 Vol.
<1%
19°C or higher
$135 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 18 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 consensus from multiple models points to a daily high of 15°C in Helsinki today, supported by persistent cloud cover, light rain, and moderate southwesterly winds averaging 7–10 m/s.** These conditions limit daytime warming over the Baltic Sea-influenced region, where typical mid-September highs average near 14–15°C. Hourly data show temperatures climbing from overnight lows around 11–12°C to afternoon peaks of 14–15°C, with high humidity near 90% and pressure around 1003 hPa. Traders assign 65% implied probability to 15°C and 31% to 16°C, reflecting model agreement on limited upside potential absent a sudden clearing trend. Updated observations through midday confirm readings near 14°C, keeping lower or higher outcomes at negligible odds.
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 18 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 16, 2026, 12:58 AM ET
Volume
$22,909End Date
Sep 18, 2026Market Opened
Sep 16, 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 18 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 consensus from multiple models points to a daily high of 15°C in Helsinki today, supported by persistent cloud cover, light rain, and moderate southwesterly winds averaging 7–10 m/s.** These conditions limit daytime warming over the Baltic Sea-influenced region, where typical mid-September highs average near 14–15°C. Hourly data show temperatures climbing from overnight lows around 11–12°C to afternoon peaks of 14–15°C, with high humidity near 90% and pressure around 1003 hPa. Traders assign 65% implied probability to 15°C and 31% to 16°C, reflecting model agreement on limited upside potential absent a sudden clearing trend. Updated observations through midday confirm readings near 14°C, keeping lower or higher outcomes at negligible odds.
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 18 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
$22,909End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=efhkResolver
0x69c47De9D...**Forecast consensus from multiple models points to a daily high of 15°C in Helsinki today, supported by persistent cloud cover, light rain, and moderate southwesterly winds averaging 7–10 m/s.** These conditions limit daytime warming over the Baltic Sea-influenced region, where typical mid-September highs average near 14–15°C. Hourly data show temperatures climbing from overnight lows around 11–12°C to afternoon peaks of 14–15°C, with high humidity near 90% and pressure around 1003 hPa. Traders assign 65% implied probability to 15°C and 31% to 16°C, reflecting model agreement on limited upside potential absent a sudden clearing trend. Updated observations through midday confirm readings near 14°C, keeping lower or higher outcomes at negligible odds.
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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