Official Met Office forecasts for London on July 25 project a maximum of 28°C under sunny intervals, aligning closely with the market's leading 28°C outcome at 35.5% implied probability. Ensemble guidance from models like ECMWF shows limited upside beyond 29°C due to moderating high pressure and a post-heatwave transition from earlier July peaks above 30°C. Typical late-July climatology hovers near 22–24°C, yet persistent warm anomalies and clear skies support the 27–29°C cluster holding over 75% combined probability. Updated model runs through July 22–23 have kept higher thresholds (31°C+) below 5% as Atlantic influences introduce modest cooling.
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 July 25?
28°C 38%
27°C 22%
29°C 19%
30°C 11%
25°C or below
8%
26°C
8%
27°C
22%
28°C
38%
29°C
19%
30°C
11%
31°C
2%
32°C
1%
33°C
<1%
34°C
<1%
35°C or higher
<1%
28°C 38%
27°C 22%
29°C 19%
30°C 11%
25°C or below
8%
26°C
8%
27°C
22%
28°C
38%
29°C
19%
30°C
11%
31°C
2%
32°C
1%
33°C
<1%
34°C
<1%
35°C or higher
<1%
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: Jul 23, 2026, 12:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...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...Official Met Office forecasts for London on July 25 project a maximum of 28°C under sunny intervals, aligning closely with the market's leading 28°C outcome at 35.5% implied probability. Ensemble guidance from models like ECMWF shows limited upside beyond 29°C due to moderating high pressure and a post-heatwave transition from earlier July peaks above 30°C. Typical late-July climatology hovers near 22–24°C, yet persistent warm anomalies and clear skies support the 27–29°C cluster holding over 75% combined probability. Updated model runs through July 22–23 have kept higher thresholds (31°C+) below 5% as Atlantic influences introduce modest cooling.
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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