Latest Met Office guidance and ensemble model consensus point to a maximum of 24 °C in London on 23 September, driven by high pressure, mostly sunny intervals, and light to moderate westerly winds that limit cloud cover and allow daytime solar heating. Afternoon temperatures are projected to peak near 23–24 °C under partly cloudy skies, with only a low risk of isolated showers in eastern areas that could briefly suppress readings. Historical September averages near 20 °C provide context for the mild anomaly, while model spread remains narrow given the stable synoptic pattern. Traders assign the highest implied probability to 24 °C because official forecasts have shown little day-to-day drift, though final hourly observations from the Met Office network will determine 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 60%
25°C 19%
23°C 16%
22°C 4%
NEW
$30,894 Vol.
NEW
$30,894 Vol.
Sep 23, 2026
18°C or below
<1%
19°C
<1%
20°C
<1%
21°C
1%
22°C
4%
23°C
16%
24°C
60%
25°C
19%
26°C
1%
27°C
<1%
28°C or higher
<1%
24°C 60%
25°C 19%
23°C 16%
22°C 4%
NEW
$30,894 Vol.
NEW
$30,894 Vol.
Sep 23, 2026
18°C or below
$1,139 Vol.
<1%
19°C
$259 Vol.
<1%
20°C
$1,108 Vol.
<1%
21°C
$1,508 Vol.
1%
22°C
$3,026 Vol.
4%
23°C
$11,567 Vol.
16%
24°C
$5,401 Vol.
60%
25°C
$4,085 Vol.
19%
26°C
$2,795 Vol.
1%
27°C
$235 Vol.
<1%
28°C or higher
$476 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.Latest Met Office guidance and ensemble model consensus point to a maximum of 24 °C in London on 23 September, driven by high pressure, mostly sunny intervals, and light to moderate westerly winds that limit cloud cover and allow daytime solar heating. Afternoon temperatures are projected to peak near 23–24 °C under partly cloudy skies, with only a low risk of isolated showers in eastern areas that could briefly suppress readings. Historical September averages near 20 °C provide context for the mild anomaly, while model spread remains narrow given the stable synoptic pattern. Traders assign the highest implied probability to 24 °C because official forecasts have shown little day-to-day drift, though final hourly observations from the Met Office network will determine 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
$30,894End 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.Latest Met Office guidance and ensemble model consensus point to a maximum of 24 °C in London on 23 September, driven by high pressure, mostly sunny intervals, and light to moderate westerly winds that limit cloud cover and allow daytime solar heating. Afternoon temperatures are projected to peak near 23–24 °C under partly cloudy skies, with only a low risk of isolated showers in eastern areas that could briefly suppress readings. Historical September averages near 20 °C provide context for the mild anomaly, while model spread remains narrow given the stable synoptic pattern. Traders assign the highest implied probability to 24 °C because official forecasts have shown little day-to-day drift, though final hourly observations from the Met Office network will determine 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
$30,894End Date
Sep 23, 2026Market Opened
Sep 21, 2026, 12:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47De9D...Latest Met Office guidance and ensemble model consensus point to a maximum of 24 °C in London on 23 September, driven by high pressure, mostly sunny intervals, and light to moderate westerly winds that limit cloud cover and allow daytime solar heating. Afternoon temperatures are projected to peak near 23–24 °C under partly cloudy skies, with only a low risk of isolated showers in eastern areas that could briefly suppress readings. Historical September averages near 20 °C provide context for the mild anomaly, while model spread remains narrow given the stable synoptic pattern. Traders assign the highest implied probability to 24 °C because official forecasts have shown little day-to-day drift, though final hourly observations from the Met Office network will determine 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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