Current forecasts from the Met Office and GFS-based models indicate a daytime high of 22–24°C for London on September 15, driven by a weakening frontal system, southwesterly to westerly winds, and variable cloud cover that limits radiative heating. The near-even market split between 23°C and 22°C reflects model timing differences on when skies clear enough for peak afternoon temperatures, alongside typical diurnal ranges and urban heat island effects in central London. Historical September averages near 20°C provide baseline context, while low precipitation odds and stable pressure patterns support limited upside beyond 24°C. Final observations from official stations will resolve the market within hours.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in London on September 15?
Highest temperature in London on September 15?
23°C 50%
22°C 41%
21°C 7%
24°C 5%
NEW
NEW
Sep 15, 2026
16°C or below
<1%
17°C
<1%
18°C
<1%
19°C
1%
20°C
1%
21°C
7%
22°C
41%
23°C
50%
24°C
5%
25°C
2%
26°C or higher
<1%
23°C 50%
22°C 41%
21°C 7%
24°C 5%
NEW
NEW
Sep 15, 2026
16°C or below
$345 Vol.
<1%
17°C
$192 Vol.
<1%
18°C
$271 Vol.
<1%
19°C
$168 Vol.
1%
20°C
$440 Vol.
1%
21°C
$779 Vol.
7%
22°C
$1,533 Vol.
41%
23°C
$3,674 Vol.
50%
24°C
$283 Vol.
5%
25°C
$485 Vol.
2%
26°C or higher
$388 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the London City 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=eglc
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.Current forecasts from the Met Office and GFS-based models indicate a daytime high of 22–24°C for London on September 15, driven by a weakening frontal system, southwesterly to westerly winds, and variable cloud cover that limits radiative heating. The near-even market split between 23°C and 22°C reflects model timing differences on when skies clear enough for peak afternoon temperatures, alongside typical diurnal ranges and urban heat island effects in central London. Historical September averages near 20°C provide baseline context, while low precipitation odds and stable pressure patterns support limited upside beyond 24°C. Final observations from official stations will resolve the market within hours.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the London City 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=eglc
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=eglc
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, 12:55 PM ET
Volume
$8,558End Date
Sep 15, 2026Market Opened
Sep 13, 2026, 12:55 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the London City 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=eglc
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.Current forecasts from the Met Office and GFS-based models indicate a daytime high of 22–24°C for London on September 15, driven by a weakening frontal system, southwesterly to westerly winds, and variable cloud cover that limits radiative heating. The near-even market split between 23°C and 22°C reflects model timing differences on when skies clear enough for peak afternoon temperatures, alongside typical diurnal ranges and urban heat island effects in central London. Historical September averages near 20°C provide baseline context, while low precipitation odds and stable pressure patterns support limited upside beyond 24°C. Final observations from official stations will resolve the market within hours.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the London City 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=eglc
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=eglc
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
$8,558End Date
Sep 15, 2026Market Opened
Sep 13, 2026, 12:55 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...Current forecasts from the Met Office and GFS-based models indicate a daytime high of 22–24°C for London on September 15, driven by a weakening frontal system, southwesterly to westerly winds, and variable cloud cover that limits radiative heating. The near-even market split between 23°C and 22°C reflects model timing differences on when skies clear enough for peak afternoon temperatures, alongside typical diurnal ranges and urban heat island effects in central London. Historical September averages near 20°C provide baseline context, while low precipitation odds and stable pressure patterns support limited upside beyond 24°C. Final observations from official stations will resolve the market within hours.
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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