Trader consensus has locked in a 23°C maximum for London on September 23, reflecting convergence across Met Office and ECMWF model runs showing stable high pressure, light winds, and limited daytime heating. Late-September climatology places typical highs near 18–20°C, but current conditions have produced a modest positive anomaly without pushing temperatures higher. Official station data, likely from Heathrow or St James’s Park, will determine resolution once the calendar day ends. The sole realistic challenges involve an unexpected late-afternoon convective cell or localized measurement variance, both of which carry negligible probability given the tight model agreement and absence of dynamic weather features.
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?
23°C 100%
18°C or below <1%
19°C <1%
20°C <1%
$80,044 Vol.
$80,044 Vol.
Sep 23, 2026
18°C or below
No
19°C
No
20°C
No
21°C
No
22°C
No
23°C
Yes
24°C
No
25°C
No
26°C
No
27°C
No
28°C or higher
No
23°C 100%
18°C or below <1%
19°C <1%
20°C <1%
$80,044 Vol.
$80,044 Vol.
Sep 23, 2026
18°C or below
$1,145 Vol.
No
19°C
$259 Vol.
No
20°C
$1,505 Vol.
No
21°C
$4,300 Vol.
No
22°C
$12,913 Vol.
No
23°C
$30,590 Vol.
Yes
24°C
$12,285 Vol.
No
25°C
$10,917 Vol.
No
26°C
$5,421 Vol.
No
27°C
$235 Vol.
No
28°C or higher
$476 Vol.
No
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.Trader consensus has locked in a 23°C maximum for London on September 23, reflecting convergence across Met Office and ECMWF model runs showing stable high pressure, light winds, and limited daytime heating. Late-September climatology places typical highs near 18–20°C, but current conditions have produced a modest positive anomaly without pushing temperatures higher. Official station data, likely from Heathrow or St James’s Park, will determine resolution once the calendar day ends. The sole realistic challenges involve an unexpected late-afternoon convective cell or localized measurement variance, both of which carry negligible probability given the tight model agreement and absence of dynamic weather features.
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
$80,044End Date
Sep 23, 2026Market Opened
Sep 21, 2026, 12:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47de9d...Outcome proposed: No
No dispute
Final outcome: No
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.Trader consensus has locked in a 23°C maximum for London on September 23, reflecting convergence across Met Office and ECMWF model runs showing stable high pressure, light winds, and limited daytime heating. Late-September climatology places typical highs near 18–20°C, but current conditions have produced a modest positive anomaly without pushing temperatures higher. Official station data, likely from Heathrow or St James’s Park, will determine resolution once the calendar day ends. The sole realistic challenges involve an unexpected late-afternoon convective cell or localized measurement variance, both of which carry negligible probability given the tight model agreement and absence of dynamic weather features.
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
$80,044End Date
Sep 23, 2026Market Opened
Sep 21, 2026, 12:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=eglcResolver
0x69c47de9d...Outcome proposed: No
No dispute
Final outcome: No
Trader consensus has locked in a 23°C maximum for London on September 23, reflecting convergence across Met Office and ECMWF model runs showing stable high pressure, light winds, and limited daytime heating. Late-September climatology places typical highs near 18–20°C, but current conditions have produced a modest positive anomaly without pushing temperatures higher. Official station data, likely from Heathrow or St James’s Park, will determine resolution once the calendar day ends. The sole realistic challenges involve an unexpected late-afternoon convective cell or localized measurement variance, both of which carry negligible probability given the tight model agreement and absence of dynamic weather features.
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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