Recent Met Office guidance and supporting model runs indicate a peak of 23–24°C across London on September 23 under partly cloudy skies with sunny intervals and light southwesterly winds. High pressure has maintained a mild southerly flow, delivering above-average late-September warmth while limiting cloud cover enough for strong insolation during peak heating hours. A weakening frontal system approaches from the northwest, introducing modest uncertainty around afternoon cloud build-up and a small rain risk, yet most ensembles keep the daily maximum within the narrow 23–24°C band. Traders have priced this consensus heavily, with implied probabilities reflecting the limited scope for either stronger warming or rapid cooling 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 London on September 23?
Highest temperature in London on September 23?
24°C 61%
23°C 20%
25°C 20%
22°C 4%
NEW
NEW
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
61%
25°C
20%
26°C
<1%
27°C
<1%
28°C or higher
<1%
24°C 61%
23°C 20%
25°C 20%
22°C 4%
NEW
NEW
Sep 23, 2026
18°C or below
$820 Vol.
<1%
19°C
$219 Vol.
<1%
20°C
$236 Vol.
<1%
21°C
$853 Vol.
2%
22°C
$931 Vol.
4%
23°C
$1,594 Vol.
20%
24°C
$2,571 Vol.
61%
25°C
$1,704 Vol.
20%
26°C
$239 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 guidance and supporting model runs indicate a peak of 23–24°C across London on September 23 under partly cloudy skies with sunny intervals and light southwesterly winds. High pressure has maintained a mild southerly flow, delivering above-average late-September warmth while limiting cloud cover enough for strong insolation during peak heating hours. A weakening frontal system approaches from the northwest, introducing modest uncertainty around afternoon cloud build-up and a small rain risk, yet most ensembles keep the daily maximum within the narrow 23–24°C band. Traders have priced this consensus heavily, with implied probabilities reflecting the limited scope for either stronger warming or rapid cooling before resolution.
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
$9,760End 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 guidance and supporting model runs indicate a peak of 23–24°C across London on September 23 under partly cloudy skies with sunny intervals and light southwesterly winds. High pressure has maintained a mild southerly flow, delivering above-average late-September warmth while limiting cloud cover enough for strong insolation during peak heating hours. A weakening frontal system approaches from the northwest, introducing modest uncertainty around afternoon cloud build-up and a small rain risk, yet most ensembles keep the daily maximum within the narrow 23–24°C band. Traders have priced this consensus heavily, with implied probabilities reflecting the limited scope for either stronger warming or rapid cooling before resolution.
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
$9,760End 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 guidance and supporting model runs indicate a peak of 23–24°C across London on September 23 under partly cloudy skies with sunny intervals and light southwesterly winds. High pressure has maintained a mild southerly flow, delivering above-average late-September warmth while limiting cloud cover enough for strong insolation during peak heating hours. A weakening frontal system approaches from the northwest, introducing modest uncertainty around afternoon cloud build-up and a small rain risk, yet most ensembles keep the daily maximum within the narrow 23–24°C band. Traders have priced this consensus heavily, with implied probabilities reflecting the limited scope for either stronger warming or rapid cooling before resolution.
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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