Official Met Office and BBC Weather guidance for August 17 shows London reaching a daytime maximum near 27°C under hazy sunshine, light northwesterly winds, and limited afternoon cloud cover that caps further warming after the early-month heatwave. This narrow range around the seasonal average aligns with observed morning temperatures in the mid-20s Celsius and supports the market’s 100% consensus at 27°C, reflecting traders’ assessment of stable synoptic conditions and model consensus. Minor forecast uncertainty remains around localized shower development or slight radiative heating under clearer skies, which could realistically shift the recorded high by 1°C in either direction before official verification.
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 17?
Highest temperature in London on August 17?
27°C 100.0%
20°C or below <1%
21°C <1%
22°C <1%
$139,264 Vol.
$139,264 Vol.
Aug 17, 2026
20°C or below
No
21°C
No
22°C
No
23°C
No
24°C
No
25°C
No
26°C
No
27°C
Yes
28°C
No
29°C
No
30°C or higher
No
27°C 100.0%
20°C or below <1%
21°C <1%
22°C <1%
$139,264 Vol.
$139,264 Vol.
Aug 17, 2026
20°C or below
$392 Vol.
No
21°C
$415 Vol.
No
22°C
$543 Vol.
No
23°C
$5,336 Vol.
No
24°C
$10,513 Vol.
No
25°C
$31,431 Vol.
No
26°C
$40,928 Vol.
No
27°C
$22,612 Vol.
Yes
28°C
$19,613 Vol.
No
29°C
$6,997 Vol.
No
30°C or higher
$485 Vol.
No
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 17 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.Official Met Office and BBC Weather guidance for August 17 shows London reaching a daytime maximum near 27°C under hazy sunshine, light northwesterly winds, and limited afternoon cloud cover that caps further warming after the early-month heatwave. This narrow range around the seasonal average aligns with observed morning temperatures in the mid-20s Celsius and supports the market’s 100% consensus at 27°C, reflecting traders’ assessment of stable synoptic conditions and model consensus. Minor forecast uncertainty remains around localized shower development or slight radiative heating under clearer skies, which could realistically shift the recorded high by 1°C in either direction before official verification.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 17 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.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 17 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 15, 2026, 4:04 PM ET
Volume
$139,264End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 4:04 PM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 17 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.Official Met Office and BBC Weather guidance for August 17 shows London reaching a daytime maximum near 27°C under hazy sunshine, light northwesterly winds, and limited afternoon cloud cover that caps further warming after the early-month heatwave. This narrow range around the seasonal average aligns with observed morning temperatures in the mid-20s Celsius and supports the market’s 100% consensus at 27°C, reflecting traders’ assessment of stable synoptic conditions and model consensus. Minor forecast uncertainty remains around localized shower development or slight radiative heating under clearer skies, which could realistically shift the recorded high by 1°C in either direction before official verification.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 17 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.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 17 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.
Volume
$139,264End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 4:04 PM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official Met Office and BBC Weather guidance for August 17 shows London reaching a daytime maximum near 27°C under hazy sunshine, light northwesterly winds, and limited afternoon cloud cover that caps further warming after the early-month heatwave. This narrow range around the seasonal average aligns with observed morning temperatures in the mid-20s Celsius and supports the market’s 100% consensus at 27°C, reflecting traders’ assessment of stable synoptic conditions and model consensus. Minor forecast uncertainty remains around localized shower development or slight radiative heating under clearer skies, which could realistically shift the recorded high by 1°C in either direction before official verification.
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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