Recent Met Office and ensemble model guidance positions a 23–24°C high for London on September 23 as the most likely outcome, driven by a stable high-pressure ridge delivering sunny intervals, light southwesterly winds shifting northwest, and only isolated low-level cloud. This setup supports modest daytime warming above the September climatological average of roughly 18–20°C without significant advection of warmer air masses. Trader consensus, reflected in the 59% implied probability for 24°C, aligns with the narrow forecast range and low precipitation risk, though minor timing shifts in cloud cover or wind could still produce a 23°C or 25°C reading. Official verification will rely on standard surface observations, with resolution expected shortly after the daily maximum is recorded.
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 23?
Highest temperature in London on September 23?
24°C 60%
23°C 20%
25°C 18%
22°C 4%
NEW
$10,680 Vol.
NEW
$10,680 Vol.
Sep 23, 2026
18°C or below
<1%
19°C
<1%
20°C
<1%
21°C
2%
22°C
4%
23°C
20%
24°C
60%
25°C
18%
26°C
<1%
27°C
<1%
28°C or higher
<1%
24°C 60%
23°C 20%
25°C 18%
22°C 4%
NEW
$10,680 Vol.
NEW
$10,680 Vol.
Sep 23, 2026
18°C or below
$870 Vol.
<1%
19°C
$259 Vol.
<1%
20°C
$236 Vol.
<1%
21°C
$929 Vol.
2%
22°C
$1,080 Vol.
4%
23°C
$1,661 Vol.
20%
24°C
$2,906 Vol.
60%
25°C
$1,756 Vol.
18%
26°C
$391 Vol.
<1%
27°C
$235 Vol.
<1%
28°C or higher
$358 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 23 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.Recent Met Office and ensemble model guidance positions a 23–24°C high for London on September 23 as the most likely outcome, driven by a stable high-pressure ridge delivering sunny intervals, light southwesterly winds shifting northwest, and only isolated low-level cloud. This setup supports modest daytime warming above the September climatological average of roughly 18–20°C without significant advection of warmer air masses. Trader consensus, reflected in the 59% implied probability for 24°C, aligns with the narrow forecast range and low precipitation risk, though minor timing shifts in cloud cover or wind could still produce a 23°C or 25°C reading. Official verification will rely on standard surface observations, with resolution expected shortly after the daily maximum is recorded.
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 23 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 21, 2026, 12:55 AM ET
Volume
$10,680End Date
Sep 23, 2026Market Opened
Sep 21, 2026, 12:55 AM 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 23 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.Recent Met Office and ensemble model guidance positions a 23–24°C high for London on September 23 as the most likely outcome, driven by a stable high-pressure ridge delivering sunny intervals, light southwesterly winds shifting northwest, and only isolated low-level cloud. This setup supports modest daytime warming above the September climatological average of roughly 18–20°C without significant advection of warmer air masses. Trader consensus, reflected in the 59% implied probability for 24°C, aligns with the narrow forecast range and low precipitation risk, though minor timing shifts in cloud cover or wind could still produce a 23°C or 25°C reading. Official verification will rely on standard surface observations, with resolution expected shortly after the daily maximum is recorded.
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 23 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
$10,680End Date
Sep 23, 2026Market Opened
Sep 21, 2026, 12:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...Recent Met Office and ensemble model guidance positions a 23–24°C high for London on September 23 as the most likely outcome, driven by a stable high-pressure ridge delivering sunny intervals, light southwesterly winds shifting northwest, and only isolated low-level cloud. This setup supports modest daytime warming above the September climatological average of roughly 18–20°C without significant advection of warmer air masses. Trader consensus, reflected in the 59% implied probability for 24°C, aligns with the narrow forecast range and low precipitation risk, though minor timing shifts in cloud cover or wind could still produce a 23°C or 25°C reading. Official verification will rely on standard surface observations, with resolution expected shortly after the daily maximum is recorded.
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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