Recent official forecasts from the Met Office and ensemble model runs indicate a moderating Atlantic airflow will keep London's July 20 maximum near 24–26°C after earlier July heatwaves peaked above 30°C. Key differentiators among these closely matched outcomes include the precise timing of any residual high-pressure ridge, urban heat island amplification in central London, and minor variations in cloud cover or wind speed that models currently resolve within a narrow 2°C envelope. With resolution hinging on verified observations at official stations, traders are weighting the most recent deterministic guidance against historical July variability around the 22–27°C climatological range.
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 20?
Highest temperature in London on July 20?
25°C 100.0%
22°C or below <1%
23°C <1%
24°C <1%
$145,159 Vol.
$145,159 Vol.
Jul 20, 2026
22°C or below
No
23°C
No
24°C
No
25°C
Yes
26°C
No
27°C
No
28°C
No
29°C
No
30°C
No
31°C
No
32°C or higher
No
25°C 100.0%
22°C or below <1%
23°C <1%
24°C <1%
$145,159 Vol.
$145,159 Vol.
Jul 20, 2026
22°C or below
$18,039 Vol.
No
23°C
$22,249 Vol.
No
24°C
$26,267 Vol.
No
25°C
$29,360 Vol.
Yes
26°C
$27,469 Vol.
No
27°C
$15,375 Vol.
No
28°C
$1,750 Vol.
No
29°C
$1,280 Vol.
No
30°C
$1,361 Vol.
No
31°C
$493 Vol.
No
32°C or higher
$1,517 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 20 Jul '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 ensemble model runs indicate a moderating Atlantic airflow will keep London's July 20 maximum near 24–26°C after earlier July heatwaves peaked above 30°C. Key differentiators among these closely matched outcomes include the precise timing of any residual high-pressure ridge, urban heat island amplification in central London, and minor variations in cloud cover or wind speed that models currently resolve within a narrow 2°C envelope. With resolution hinging on verified observations at official stations, traders are weighting the most recent deterministic guidance against historical July variability around the 22–27°C climatological range.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 20 Jul '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.
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 18, 2026, 12:02 AM ET
Volume
$145,159End Date
Jul 20, 2026Market Opened
Jul 18, 2026, 12:02 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 20 Jul '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 ensemble model runs indicate a moderating Atlantic airflow will keep London's July 20 maximum near 24–26°C after earlier July heatwaves peaked above 30°C. Key differentiators among these closely matched outcomes include the precise timing of any residual high-pressure ridge, urban heat island amplification in central London, and minor variations in cloud cover or wind speed that models currently resolve within a narrow 2°C envelope. With resolution hinging on verified observations at official stations, traders are weighting the most recent deterministic guidance against historical July variability around the 22–27°C climatological range.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 20 Jul '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.
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
$145,159End Date
Jul 20, 2026Market Opened
Jul 18, 2026, 12:02 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent official forecasts from the Met Office and ensemble model runs indicate a moderating Atlantic airflow will keep London's July 20 maximum near 24–26°C after earlier July heatwaves peaked above 30°C. Key differentiators among these closely matched outcomes include the precise timing of any residual high-pressure ridge, urban heat island amplification in central London, and minor variations in cloud cover or wind speed that models currently resolve within a narrow 2°C envelope. With resolution hinging on verified observations at official stations, traders are weighting the most recent deterministic guidance against historical July variability around the 22–27°C climatological range.
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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