Latest Met Office and ECMWF model runs indicate peak temperatures in London on August 15 will most likely reach 26–27 °C, with ensemble spreads producing the tight 33.5 % / 32 % split between those two outcomes. Mid-August climatology for the city centers near 23–24 °C, so current guidance reflects modest high-pressure influence and limited Atlantic cooling; small differences in boundary-layer mixing and cloud cover separate the 25 °C and 28 °C probabilities. Updated short-range forecasts issued overnight will provide the final observational anchor before markets close.
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?
27°C 34%
26°C 32%
28°C 14%
25°C 12%
$23,591 Vol.
$23,591 Vol.
20°C or below
<1%
21°C
<1%
22°C
<1%
23°C
1%
24°C
4%
25°C
12%
26°C
32%
27°C
34%
28°C
14%
29°C
6%
30°C or higher
2%
27°C 34%
26°C 32%
28°C 14%
25°C 12%
$23,591 Vol.
$23,591 Vol.
20°C or below
<1%
21°C
<1%
22°C
<1%
23°C
1%
24°C
4%
25°C
12%
26°C
32%
27°C
34%
28°C
14%
29°C
6%
30°C or higher
2%
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
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...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.
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Latest Met Office and ECMWF model runs indicate peak temperatures in London on August 15 will most likely reach 26–27 °C, with ensemble spreads producing the tight 33.5 % / 32 % split between those two outcomes. Mid-August climatology for the city centers near 23–24 °C, so current guidance reflects modest high-pressure influence and limited Atlantic cooling; small differences in boundary-layer mixing and cloud cover separate the 25 °C and 28 °C probabilities. Updated short-range forecasts issued overnight will provide the final observational anchor before markets close.
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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