Recent Met Office and ECMWF ensemble runs indicate a building high-pressure system drawing warm southerly air across southern England, supporting maximum temperatures near 30°C in London on August 12 with mostly clear skies and strong insolation. Model consensus clusters tightly between 29–31°C because small variations in boundary-layer mixing, cloud timing, and urban heat-island amplification can shift the daily peak by 1–2°C. Trader sentiment, reflected in the closely matched 29°C (33 %) and 30°C (41.5 %) shares, therefore hinges on the latest short-range guidance and any afternoon convective development that could cap temperatures. Historical August maxima in central London average around 22–24°C, underscoring how the current synoptic setup represents a notable positive anomaly. Updated model runs and official Met Office forecasts through the next 48 hours remain the key catalysts for further market movement.
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 12?
Highest temperature in London on August 12?
30°C 42%
29°C 33%
31°C 20%
28°C 9%
NEW
NEW
Aug 12, 2026
24°C or below
<1%
25°C
<1%
26°C
2%
27°C
3%
28°C
9%
29°C
33%
30°C
42%
31°C
20%
32°C
6%
33°C
6%
34°C or higher
3%
30°C 42%
29°C 33%
31°C 20%
28°C 9%
NEW
NEW
Aug 12, 2026
24°C or below
$40 Vol.
<1%
25°C
$30 Vol.
<1%
26°C
$0 Vol.
2%
27°C
$35 Vol.
3%
28°C
$51 Vol.
9%
29°C
$253 Vol.
33%
30°C
$414 Vol.
42%
31°C
$421 Vol.
20%
32°C
$5 Vol.
6%
33°C
$0 Vol.
6%
34°C or higher
$0 Vol.
3%
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 12 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 Met Office and ECMWF ensemble runs indicate a building high-pressure system drawing warm southerly air across southern England, supporting maximum temperatures near 30°C in London on August 12 with mostly clear skies and strong insolation. Model consensus clusters tightly between 29–31°C because small variations in boundary-layer mixing, cloud timing, and urban heat-island amplification can shift the daily peak by 1–2°C. Trader sentiment, reflected in the closely matched 29°C (33 %) and 30°C (41.5 %) shares, therefore hinges on the latest short-range guidance and any afternoon convective development that could cap temperatures. Historical August maxima in central London average around 22–24°C, underscoring how the current synoptic setup represents a notable positive anomaly. Updated model runs and official Met Office forecasts through the next 48 hours remain the key catalysts for further market movement.
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 12 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 12 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 10, 2026, 12:03 AM ET
Volume
$1,250End Date
Aug 12, 2026Market Opened
Aug 10, 2026, 12:03 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...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 12 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 Met Office and ECMWF ensemble runs indicate a building high-pressure system drawing warm southerly air across southern England, supporting maximum temperatures near 30°C in London on August 12 with mostly clear skies and strong insolation. Model consensus clusters tightly between 29–31°C because small variations in boundary-layer mixing, cloud timing, and urban heat-island amplification can shift the daily peak by 1–2°C. Trader sentiment, reflected in the closely matched 29°C (33 %) and 30°C (41.5 %) shares, therefore hinges on the latest short-range guidance and any afternoon convective development that could cap temperatures. Historical August maxima in central London average around 22–24°C, underscoring how the current synoptic setup represents a notable positive anomaly. Updated model runs and official Met Office forecasts through the next 48 hours remain the key catalysts for further market movement.
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 12 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 12 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
$1,250End Date
Aug 12, 2026Market Opened
Aug 10, 2026, 12:03 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Recent Met Office and ECMWF ensemble runs indicate a building high-pressure system drawing warm southerly air across southern England, supporting maximum temperatures near 30°C in London on August 12 with mostly clear skies and strong insolation. Model consensus clusters tightly between 29–31°C because small variations in boundary-layer mixing, cloud timing, and urban heat-island amplification can shift the daily peak by 1–2°C. Trader sentiment, reflected in the closely matched 29°C (33 %) and 30°C (41.5 %) shares, therefore hinges on the latest short-range guidance and any afternoon convective development that could cap temperatures. Historical August maxima in central London average around 22–24°C, underscoring how the current synoptic setup represents a notable positive anomaly. Updated model runs and official Met Office forecasts through the next 48 hours remain the key catalysts for further market movement.
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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