Recent Met Office forecasts indicate a maximum of 23°C for London on August 20 under a weakening high-pressure influence giving way to fresher Atlantic airflow, with scattered showers and increased cloud cover limiting insolation. Ensemble model runs show narrow spreads centered on 22–24°C, where small differences in timing of frontal passages or boundary-layer mixing can shift peak readings by 1–2°C. Urban heat-island effects and measurement at official sites like Heathrow further modulate outcomes within this tight range, while the broader 2026 summer warmth provides climatological context but little day-specific signal. Updated model guidance on August 19 will likely refine trader consensus 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 August 20?
Highest temperature in London on August 20?
23°C 30%
22°C 27%
24°C 20%
21°C 15%
NEW
NEW
Aug 20, 2026
19°C or below
2%
20°C
3%
21°C
15%
22°C
27%
23°C
30%
24°C
20%
25°C
5%
26°C
2%
27°C
<1%
28°C
<1%
29°C or higher
<1%
23°C 30%
22°C 27%
24°C 20%
21°C 15%
NEW
NEW
Aug 20, 2026
19°C or below
$34 Vol.
2%
20°C
$30 Vol.
3%
21°C
$228 Vol.
15%
22°C
$209 Vol.
27%
23°C
$706 Vol.
30%
24°C
$870 Vol.
20%
25°C
$77 Vol.
5%
26°C
$88 Vol.
2%
27°C
$322 Vol.
<1%
28°C
$386 Vol.
<1%
29°C or higher
$386 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 20 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.Recent Met Office forecasts indicate a maximum of 23°C for London on August 20 under a weakening high-pressure influence giving way to fresher Atlantic airflow, with scattered showers and increased cloud cover limiting insolation. Ensemble model runs show narrow spreads centered on 22–24°C, where small differences in timing of frontal passages or boundary-layer mixing can shift peak readings by 1–2°C. Urban heat-island effects and measurement at official sites like Heathrow further modulate outcomes within this tight range, while the broader 2026 summer warmth provides climatological context but little day-specific signal. Updated model guidance on August 19 will likely refine trader consensus ahead of resolution.
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 20 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 20 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 18, 2026, 12:55 AM ET
Volume
$3,336End Date
Aug 20, 2026Market Opened
Aug 18, 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 20 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.Recent Met Office forecasts indicate a maximum of 23°C for London on August 20 under a weakening high-pressure influence giving way to fresher Atlantic airflow, with scattered showers and increased cloud cover limiting insolation. Ensemble model runs show narrow spreads centered on 22–24°C, where small differences in timing of frontal passages or boundary-layer mixing can shift peak readings by 1–2°C. Urban heat-island effects and measurement at official sites like Heathrow further modulate outcomes within this tight range, while the broader 2026 summer warmth provides climatological context but little day-specific signal. Updated model guidance on August 19 will likely refine trader consensus ahead of resolution.
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 20 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 20 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
$3,336End Date
Aug 20, 2026Market Opened
Aug 18, 2026, 12:55 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Recent Met Office forecasts indicate a maximum of 23°C for London on August 20 under a weakening high-pressure influence giving way to fresher Atlantic airflow, with scattered showers and increased cloud cover limiting insolation. Ensemble model runs show narrow spreads centered on 22–24°C, where small differences in timing of frontal passages or boundary-layer mixing can shift peak readings by 1–2°C. Urban heat-island effects and measurement at official sites like Heathrow further modulate outcomes within this tight range, while the broader 2026 summer warmth provides climatological context but little day-specific signal. Updated model guidance on August 19 will likely refine trader consensus 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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