Current forecast models from sources like the Met Office and AccuWeather indicate a high around 19–22°C for London on August 21, 2026, driven by a post-heatwave cooling trend with Atlantic air bringing cloud cover, showers, and lighter winds that limit daytime warming. This aligns with the market's tight clustering on 21°C (46.5%) and 22°C (35.5%), reflecting typical late-summer baselines near 21–22°C and uncertainty over exact cloud breaks or shower timing that could nudge maxima up or down. Recent model runs emphasize unsettled conditions suppressing peaks below recent spikes, with official observations expected to resolve the market shortly after the day ends.
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 21?
Highest temperature in London on August 21?
21°C 47%
22°C 36%
20°C 12%
23°C 6%
NEW
NEW
Aug 21, 2026
17°C or below
1%
18°C
2%
19°C
3%
20°C
12%
21°C
47%
22°C
36%
23°C
6%
24°C
2%
25°C
<1%
26°C
<1%
27°C or higher
<1%
21°C 47%
22°C 36%
20°C 12%
23°C 6%
NEW
NEW
Aug 21, 2026
17°C or below
$987 Vol.
1%
18°C
$398 Vol.
2%
19°C
$488 Vol.
3%
20°C
$769 Vol.
12%
21°C
$2,371 Vol.
47%
22°C
$2,112 Vol.
36%
23°C
$1,030 Vol.
6%
24°C
$488 Vol.
2%
25°C
$385 Vol.
<1%
26°C
$492 Vol.
<1%
27°C or higher
$444 Vol.
<1%
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 21 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.Current forecast models from sources like the Met Office and AccuWeather indicate a high around 19–22°C for London on August 21, 2026, driven by a post-heatwave cooling trend with Atlantic air bringing cloud cover, showers, and lighter winds that limit daytime warming. This aligns with the market's tight clustering on 21°C (46.5%) and 22°C (35.5%), reflecting typical late-summer baselines near 21–22°C and uncertainty over exact cloud breaks or shower timing that could nudge maxima up or down. Recent model runs emphasize unsettled conditions suppressing peaks below recent spikes, with official observations expected to resolve the market shortly after the day ends.
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 21 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 21 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 19, 2026, 12:55 AM ET
Volume
$9,965End Date
Aug 21, 2026Market Opened
Aug 19, 2026, 12:55 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...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 21 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.Current forecast models from sources like the Met Office and AccuWeather indicate a high around 19–22°C for London on August 21, 2026, driven by a post-heatwave cooling trend with Atlantic air bringing cloud cover, showers, and lighter winds that limit daytime warming. This aligns with the market's tight clustering on 21°C (46.5%) and 22°C (35.5%), reflecting typical late-summer baselines near 21–22°C and uncertainty over exact cloud breaks or shower timing that could nudge maxima up or down. Recent model runs emphasize unsettled conditions suppressing peaks below recent spikes, with official observations expected to resolve the market shortly after the day ends.
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 21 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 21 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
$9,965End Date
Aug 21, 2026Market Opened
Aug 19, 2026, 12:55 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Current forecast models from sources like the Met Office and AccuWeather indicate a high around 19–22°C for London on August 21, 2026, driven by a post-heatwave cooling trend with Atlantic air bringing cloud cover, showers, and lighter winds that limit daytime warming. This aligns with the market's tight clustering on 21°C (46.5%) and 22°C (35.5%), reflecting typical late-summer baselines near 21–22°C and uncertainty over exact cloud breaks or shower timing that could nudge maxima up or down. Recent model runs emphasize unsettled conditions suppressing peaks below recent spikes, with official observations expected to resolve the market shortly after the day ends.
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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