Recent official forecasts from the Met Office and European models converged on a peak of 34°C for central London on August 13 under persistent high-pressure subsidence and southerly flow advecting warm air from the continent. This consensus, reinforced by ensemble runs showing limited diurnal variability and no significant convective cooling, underpins the market’s near-certain positioning at 34°C. Historical August baselines and current soil-moisture deficits further supported expectations of reaching but not substantially exceeding that threshold before resolution criteria are met. Uncertainties remain around localized urban heat-island effects or last-minute model adjustments that could shift the recorded maximum by 1–2°C at official stations.
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 August 13?
Highest temperature in London on August 13?
34°C 100.0%
30°C or below <1%
31°C <1%
32°C <1%
$217,108 Vol.
$217,108 Vol.
Aug 13, 2026
30°C or below
No
31°C
No
32°C
No
33°C
No
34°C
Yes
35°C
No
36°C
No
37°C
No
38°C
No
39°C
No
40°C or higher
No
34°C 100.0%
30°C or below <1%
31°C <1%
32°C <1%
$217,108 Vol.
$217,108 Vol.
Aug 13, 2026
30°C or below
$8,769 Vol.
No
31°C
$6,755 Vol.
No
32°C
$11,734 Vol.
No
33°C
$37,435 Vol.
No
34°C
$43,652 Vol.
Yes
35°C
$34,846 Vol.
No
36°C
$35,402 Vol.
No
37°C
$20,393 Vol.
No
38°C
$12,908 Vol.
No
39°C
$3,751 Vol.
No
40°C or higher
$1,463 Vol.
No
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the London City Airport Station, available here: https://www.wunderground.com/history/daily/gb/london/EGLC.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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 official forecasts from the Met Office and European models converged on a peak of 34°C for central London on August 13 under persistent high-pressure subsidence and southerly flow advecting warm air from the continent. This consensus, reinforced by ensemble runs showing limited diurnal variability and no significant convective cooling, underpins the market’s near-certain positioning at 34°C. Historical August baselines and current soil-moisture deficits further supported expectations of reaching but not substantially exceeding that threshold before resolution criteria are met. Uncertainties remain around localized urban heat-island effects or last-minute model adjustments that could shift the recorded maximum by 1–2°C at official stations.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the London City Airport Station, available here: https://www.wunderground.com/history/daily/gb/london/EGLC.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the London City Airport Station, available here: https://www.wunderground.com/history/daily/gb/london/EGLC.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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: Aug 11, 2026, 1:02 AM ET
Volume
$217,108End Date
Aug 13, 2026Market Opened
Aug 11, 2026, 1:02 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the London City Airport Station, available here: https://www.wunderground.com/history/daily/gb/london/EGLC.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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 official forecasts from the Met Office and European models converged on a peak of 34°C for central London on August 13 under persistent high-pressure subsidence and southerly flow advecting warm air from the continent. This consensus, reinforced by ensemble runs showing limited diurnal variability and no significant convective cooling, underpins the market’s near-certain positioning at 34°C. Historical August baselines and current soil-moisture deficits further supported expectations of reaching but not substantially exceeding that threshold before resolution criteria are met. Uncertainties remain around localized urban heat-island effects or last-minute model adjustments that could shift the recorded maximum by 1–2°C at official stations.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the London City Airport Station, available here: https://www.wunderground.com/history/daily/gb/london/EGLC.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 13 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the London City Airport Station, available here: https://www.wunderground.com/history/daily/gb/london/EGLC.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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
$217,108End Date
Aug 13, 2026Market Opened
Aug 11, 2026, 1:02 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
Recent official forecasts from the Met Office and European models converged on a peak of 34°C for central London on August 13 under persistent high-pressure subsidence and southerly flow advecting warm air from the continent. This consensus, reinforced by ensemble runs showing limited diurnal variability and no significant convective cooling, underpins the market’s near-certain positioning at 34°C. Historical August baselines and current soil-moisture deficits further supported expectations of reaching but not substantially exceeding that threshold before resolution criteria are met. Uncertainties remain around localized urban heat-island effects or last-minute model adjustments that could shift the recorded maximum by 1–2°C at official stations.
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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