Recent Met Office guidance and supporting ensemble model runs point to a daytime maximum near 27°C in London on August 15 under sunny intervals, after an earlier heatwave yields to fresher Atlantic air and possible scattered showers. This places the leading market-implied outcomes of 27°C (37.5%) and 26°C (32%) in close contention, driven by small differences in forecast cloud cover, boundary-layer humidity, and the precise timing of any thundery activity. Historical August averages hover around 22–23°C, so current conditions reflect residual warmth from a warmer-than-normal summer, tempered by the approaching frontal boundary. Traders weigh the latest high-resolution model updates and official briefings for any last adjustments 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 August 15?
Highest temperature in London on August 15?
27°C 39%
26°C 33%
25°C 11%
28°C 11%
NEW
$26,672 Vol.
NEW
$26,672 Vol.
Aug 15, 2026
20°C or below
<1%
21°C
<1%
22°C
<1%
23°C
1%
24°C
6%
25°C
11%
26°C
33%
27°C
39%
28°C
11%
29°C
5%
30°C or higher
1%
27°C 39%
26°C 33%
25°C 11%
28°C 11%
NEW
$26,672 Vol.
NEW
$26,672 Vol.
Aug 15, 2026
20°C or below
$1,200 Vol.
<1%
21°C
$636 Vol.
<1%
22°C
$627 Vol.
<1%
23°C
$1,605 Vol.
1%
24°C
$2,025 Vol.
6%
25°C
$3,465 Vol.
11%
26°C
$2,961 Vol.
33%
27°C
$4,423 Vol.
39%
28°C
$1,928 Vol.
11%
29°C
$3,021 Vol.
5%
30°C or higher
$4,781 Vol.
1%
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 15 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 guidance and supporting ensemble model runs point to a daytime maximum near 27°C in London on August 15 under sunny intervals, after an earlier heatwave yields to fresher Atlantic air and possible scattered showers. This places the leading market-implied outcomes of 27°C (37.5%) and 26°C (32%) in close contention, driven by small differences in forecast cloud cover, boundary-layer humidity, and the precise timing of any thundery activity. Historical August averages hover around 22–23°C, so current conditions reflect residual warmth from a warmer-than-normal summer, tempered by the approaching frontal boundary. Traders weigh the latest high-resolution model updates and official briefings for any last adjustments before resolution.
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 15 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 15 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 13, 2026, 12:55 AM ET
Volume
$26,672End Date
Aug 15, 2026Market Opened
Aug 13, 2026, 12:55 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 15 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 guidance and supporting ensemble model runs point to a daytime maximum near 27°C in London on August 15 under sunny intervals, after an earlier heatwave yields to fresher Atlantic air and possible scattered showers. This places the leading market-implied outcomes of 27°C (37.5%) and 26°C (32%) in close contention, driven by small differences in forecast cloud cover, boundary-layer humidity, and the precise timing of any thundery activity. Historical August averages hover around 22–23°C, so current conditions reflect residual warmth from a warmer-than-normal summer, tempered by the approaching frontal boundary. Traders weigh the latest high-resolution model updates and official briefings for any last adjustments before resolution.
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 15 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 15 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
$26,672End Date
Aug 15, 2026Market Opened
Aug 13, 2026, 12:55 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Recent Met Office guidance and supporting ensemble model runs point to a daytime maximum near 27°C in London on August 15 under sunny intervals, after an earlier heatwave yields to fresher Atlantic air and possible scattered showers. This places the leading market-implied outcomes of 27°C (37.5%) and 26°C (32%) in close contention, driven by small differences in forecast cloud cover, boundary-layer humidity, and the precise timing of any thundery activity. Historical August averages hover around 22–23°C, so current conditions reflect residual warmth from a warmer-than-normal summer, tempered by the approaching frontal boundary. Traders weigh the latest high-resolution model updates and official briefings for any last adjustments 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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