Official Met Office observations from London stations, including central sites like Kew Gardens and Lord's, recorded a daily maximum of 26°C on August 18, 2026, following the mid-August heatwave peak of 38.1°C. This aligns with forecast models showing post-frontal cooling, moderate Atlantic airflow, and temperatures returning near seasonal averages after sustained high pressure. Trader consensus at 100% for 26°C reflects verified station data resolving the market, with historical baselines for late August around 22–24°C providing context. Revisions to official records or inclusion of outlier suburban stations exceeding 26°C remain the only realistic challenges, though unlikely given multiple confirming reports.
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 18?
Highest temperature in London on August 18?
26°C 100.0%
22°C or below <1%
23°C <1%
24°C <1%
$162,575 Vol.
$162,575 Vol.
Aug 18, 2026
22°C or below
No
23°C
No
24°C
No
25°C
No
26°C
Yes
27°C
No
28°C
No
29°C
No
30°C
No
31°C
No
32°C or higher
No
26°C 100.0%
22°C or below <1%
23°C <1%
24°C <1%
$162,575 Vol.
$162,575 Vol.
Aug 18, 2026
22°C or below
$12,479 Vol.
No
23°C
$26,667 Vol.
No
24°C
$34,830 Vol.
No
25°C
$24,364 Vol.
No
26°C
$25,487 Vol.
Yes
27°C
$19,953 Vol.
No
28°C
$12,327 Vol.
No
29°C
$4,802 Vol.
No
30°C
$557 Vol.
No
31°C
$557 Vol.
No
32°C or higher
$552 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 18 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 observations from London stations, including central sites like Kew Gardens and Lord's, recorded a daily maximum of 26°C on August 18, 2026, following the mid-August heatwave peak of 38.1°C. This aligns with forecast models showing post-frontal cooling, moderate Atlantic airflow, and temperatures returning near seasonal averages after sustained high pressure. Trader consensus at 100% for 26°C reflects verified station data resolving the market, with historical baselines for late August around 22–24°C providing context. Revisions to official records or inclusion of outlier suburban stations exceeding 26°C remain the only realistic challenges, though unlikely given multiple confirming reports.
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 18 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 18 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 16, 2026, 12:55 AM ET
Volume
$162,575End Date
Aug 18, 2026Market Opened
Aug 16, 2026, 12:55 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 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 18 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 observations from London stations, including central sites like Kew Gardens and Lord's, recorded a daily maximum of 26°C on August 18, 2026, following the mid-August heatwave peak of 38.1°C. This aligns with forecast models showing post-frontal cooling, moderate Atlantic airflow, and temperatures returning near seasonal averages after sustained high pressure. Trader consensus at 100% for 26°C reflects verified station data resolving the market, with historical baselines for late August around 22–24°C providing context. Revisions to official records or inclusion of outlier suburban stations exceeding 26°C remain the only realistic challenges, though unlikely given multiple confirming reports.
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 18 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 18 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
$162,575End Date
Aug 18, 2026Market Opened
Aug 16, 2026, 12:55 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official Met Office observations from London stations, including central sites like Kew Gardens and Lord's, recorded a daily maximum of 26°C on August 18, 2026, following the mid-August heatwave peak of 38.1°C. This aligns with forecast models showing post-frontal cooling, moderate Atlantic airflow, and temperatures returning near seasonal averages after sustained high pressure. Trader consensus at 100% for 26°C reflects verified station data resolving the market, with historical baselines for late August around 22–24°C providing context. Revisions to official records or inclusion of outlier suburban stations exceeding 26°C remain the only realistic challenges, though unlikely given multiple confirming reports.
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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