Current Met Office guidance and ensemble models indicate a maximum of around 30 °C for London on July 12 amid the tail end of a prolonged heatwave, supporting the near-equal market weighting on 28 °C and 29 °C. Key differentiators include subtle shifts in the position of the high-pressure ridge, boundary-layer mixing, and urban heat-island amplification at official stations such as Heathrow; slight increases in low-level moisture or a marginally earlier Atlantic front could cap readings at 27–28 °C, while clearer skies and stronger insolation would favor 30 °C. Updated high-resolution runs and Met Office briefings over the next 48 hours will narrow these thresholds ahead of 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 July 12?
Highest temperature in London on July 12?
28°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$133,903 Vol.
$133,903 Vol.
Jul 12, 2026
24°C or below
No
25°C
No
26°C
No
27°C
No
28°C
Yes
29°C
No
30°C
No
31°C
No
32°C
No
33°C
No
34°C or higher
No
28°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$133,903 Vol.
$133,903 Vol.
Jul 12, 2026
24°C or below
$1,344 Vol.
No
25°C
$6,084 Vol.
No
26°C
$26,494 Vol.
No
27°C
$33,862 Vol.
No
28°C
$18,937 Vol.
Yes
29°C
$19,303 Vol.
No
30°C
$15,154 Vol.
No
31°C
$6,656 Vol.
No
32°C
$2,015 Vol.
No
33°C
$961 Vol.
No
34°C or higher
$3,094 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 12 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.Current Met Office guidance and ensemble models indicate a maximum of around 30 °C for London on July 12 amid the tail end of a prolonged heatwave, supporting the near-equal market weighting on 28 °C and 29 °C. Key differentiators include subtle shifts in the position of the high-pressure ridge, boundary-layer mixing, and urban heat-island amplification at official stations such as Heathrow; slight increases in low-level moisture or a marginally earlier Atlantic front could cap readings at 27–28 °C, while clearer skies and stronger insolation would favor 30 °C. Updated high-resolution runs and Met Office briefings over the next 48 hours will narrow these thresholds ahead of resolution.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 12 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 10, 2026, 12:02 AM ET
Volume
$133,903End Date
Jul 12, 2026Market Opened
Jul 10, 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 12 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.Current Met Office guidance and ensemble models indicate a maximum of around 30 °C for London on July 12 amid the tail end of a prolonged heatwave, supporting the near-equal market weighting on 28 °C and 29 °C. Key differentiators include subtle shifts in the position of the high-pressure ridge, boundary-layer mixing, and urban heat-island amplification at official stations such as Heathrow; slight increases in low-level moisture or a marginally earlier Atlantic front could cap readings at 27–28 °C, while clearer skies and stronger insolation would favor 30 °C. Updated high-resolution runs and Met Office briefings over the next 48 hours will narrow these thresholds ahead of resolution.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 12 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
$133,903End Date
Jul 12, 2026Market Opened
Jul 10, 2026, 12:02 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Current Met Office guidance and ensemble models indicate a maximum of around 30 °C for London on July 12 amid the tail end of a prolonged heatwave, supporting the near-equal market weighting on 28 °C and 29 °C. Key differentiators include subtle shifts in the position of the high-pressure ridge, boundary-layer mixing, and urban heat-island amplification at official stations such as Heathrow; slight increases in low-level moisture or a marginally earlier Atlantic front could cap readings at 27–28 °C, while clearer skies and stronger insolation would favor 30 °C. Updated high-resolution runs and Met Office briefings over the next 48 hours will narrow these thresholds ahead of 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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