A strong high-pressure system and southerly airflow have driven an exceptional heatwave across southern England, producing warm, humid nights that limit radiative cooling and keep minimum temperatures elevated. Official Met Office guidance for 26 June projects a nighttime low near 21°C in London, consistent with the market’s leading 19°C outcome at 34.5% and clustered probabilities around 20–23°C. Key variables include the exact timing of any weakening in the ridge, cloud-cover evolution that could enhance or suppress overnight cooling, and minor model spread in boundary-layer moisture. With resolution only 48 hours away and ensemble guidance still showing modest variability, traders are pricing in a narrow but uncertain range centered on these unusually high June minima rather than typical climatological values near 12–14°C.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in London on June 26?
Lowest temperature in London on June 26?
22°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$18,136 Vol.
$18,136 Vol.
Jun 26, 2026
18°C or below
No
19°C
No
20°C
No
21°C
No
22°C
Yes
23°C
No
24°C
No
25°C
No
26°C
No
27°C
No
28°C or higher
No
22°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$18,136 Vol.
$18,136 Vol.
Jun 26, 2026
18°C or below
$901 Vol.
No
19°C
$891 Vol.
No
20°C
$2,233 Vol.
No
21°C
$3,418 Vol.
No
22°C
$3,057 Vol.
Yes
23°C
$3,872 Vol.
No
24°C
$1,187 Vol.
No
25°C
$640 Vol.
No
26°C
$740 Vol.
No
27°C
$518 Vol.
No
28°C or higher
$679 Vol.
No
This market will resolve to the temperature range that contains the lowest temperature recorded at the London City Airport Station in degrees Celsius on 26 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the lowest 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.A strong high-pressure system and southerly airflow have driven an exceptional heatwave across southern England, producing warm, humid nights that limit radiative cooling and keep minimum temperatures elevated. Official Met Office guidance for 26 June projects a nighttime low near 21°C in London, consistent with the market’s leading 19°C outcome at 34.5% and clustered probabilities around 20–23°C. Key variables include the exact timing of any weakening in the ridge, cloud-cover evolution that could enhance or suppress overnight cooling, and minor model spread in boundary-layer moisture. With resolution only 48 hours away and ensemble guidance still showing modest variability, traders are pricing in a narrow but uncertain range centered on these unusually high June minima rather than typical climatological values near 12–14°C.
This market will resolve to the temperature range that contains the lowest temperature recorded at the London City Airport Station in degrees Celsius on 26 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the lowest 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 lowest 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: Jun 24, 2026, 12:30 AM ET
Volume
$18,136End Date
Jun 26, 2026Market Opened
Jun 24, 2026, 12:30 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 lowest temperature recorded at the London City Airport Station in degrees Celsius on 26 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the lowest 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.A strong high-pressure system and southerly airflow have driven an exceptional heatwave across southern England, producing warm, humid nights that limit radiative cooling and keep minimum temperatures elevated. Official Met Office guidance for 26 June projects a nighttime low near 21°C in London, consistent with the market’s leading 19°C outcome at 34.5% and clustered probabilities around 20–23°C. Key variables include the exact timing of any weakening in the ridge, cloud-cover evolution that could enhance or suppress overnight cooling, and minor model spread in boundary-layer moisture. With resolution only 48 hours away and ensemble guidance still showing modest variability, traders are pricing in a narrow but uncertain range centered on these unusually high June minima rather than typical climatological values near 12–14°C.
This market will resolve to the temperature range that contains the lowest temperature recorded at the London City Airport Station in degrees Celsius on 26 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the lowest 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 lowest 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
$18,136End Date
Jun 26, 2026Market Opened
Jun 24, 2026, 12:30 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
A strong high-pressure system and southerly airflow have driven an exceptional heatwave across southern England, producing warm, humid nights that limit radiative cooling and keep minimum temperatures elevated. Official Met Office guidance for 26 June projects a nighttime low near 21°C in London, consistent with the market’s leading 19°C outcome at 34.5% and clustered probabilities around 20–23°C. Key variables include the exact timing of any weakening in the ridge, cloud-cover evolution that could enhance or suppress overnight cooling, and minor model spread in boundary-layer moisture. With resolution only 48 hours away and ensemble guidance still showing modest variability, traders are pricing in a narrow but uncertain range centered on these unusually high June minima rather than typical climatological values near 12–14°C.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions