Recent Met Office forecasts for London indicate a shift to cloudier conditions on August 18, with maximum daytime temperatures expected around 25–26°C amid increased Atlantic influence and patchy rain or drizzle. This follows a mid-August heatwave that delivered 34–38°C peaks earlier in the month, driven by persistent high pressure. Incoming frontal systems and greater cloud cover are now limiting solar heating and convective uplift, moderating highs relative to recent clear-sky extremes. Ensemble model consensus supports this cooling trend, with minor uncertainties in exact cloud thickness, shower timing, and wind-driven mixing creating the narrow spread among 24–26°C outcomes. Official resolution will rely on verified station maxima from sources like Heathrow or Kew Gardens.
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?
25°C 30%
24°C 27%
26°C 19%
23°C 12%
NEW
$12,637 Vol.
NEW
$12,637 Vol.
Aug 18, 2026
22°C or below
6%
23°C
12%
24°C
27%
25°C
30%
26°C
19%
27°C
9%
28°C
4%
29°C
1%
30°C
<1%
31°C
<1%
32°C or higher
<1%
25°C 30%
24°C 27%
26°C 19%
23°C 12%
NEW
$12,637 Vol.
NEW
$12,637 Vol.
Aug 18, 2026
22°C or below
$542 Vol.
6%
23°C
$632 Vol.
12%
24°C
$1,715 Vol.
27%
25°C
$3,514 Vol.
30%
26°C
$2,121 Vol.
19%
27°C
$842 Vol.
9%
28°C
$319 Vol.
4%
29°C
$1,342 Vol.
1%
30°C
$552 Vol.
<1%
31°C
$552 Vol.
<1%
32°C or higher
$552 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 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.Recent Met Office forecasts for London indicate a shift to cloudier conditions on August 18, with maximum daytime temperatures expected around 25–26°C amid increased Atlantic influence and patchy rain or drizzle. This follows a mid-August heatwave that delivered 34–38°C peaks earlier in the month, driven by persistent high pressure. Incoming frontal systems and greater cloud cover are now limiting solar heating and convective uplift, moderating highs relative to recent clear-sky extremes. Ensemble model consensus supports this cooling trend, with minor uncertainties in exact cloud thickness, shower timing, and wind-driven mixing creating the narrow spread among 24–26°C outcomes. Official resolution will rely on verified station maxima from sources like Heathrow or Kew Gardens.
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
$12,637End Date
Aug 18, 2026Market Opened
Aug 16, 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 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.Recent Met Office forecasts for London indicate a shift to cloudier conditions on August 18, with maximum daytime temperatures expected around 25–26°C amid increased Atlantic influence and patchy rain or drizzle. This follows a mid-August heatwave that delivered 34–38°C peaks earlier in the month, driven by persistent high pressure. Incoming frontal systems and greater cloud cover are now limiting solar heating and convective uplift, moderating highs relative to recent clear-sky extremes. Ensemble model consensus supports this cooling trend, with minor uncertainties in exact cloud thickness, shower timing, and wind-driven mixing creating the narrow spread among 24–26°C outcomes. Official resolution will rely on verified station maxima from sources like Heathrow or Kew Gardens.
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
$12,637End Date
Aug 18, 2026Market Opened
Aug 16, 2026, 12:55 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Recent Met Office forecasts for London indicate a shift to cloudier conditions on August 18, with maximum daytime temperatures expected around 25–26°C amid increased Atlantic influence and patchy rain or drizzle. This follows a mid-August heatwave that delivered 34–38°C peaks earlier in the month, driven by persistent high pressure. Incoming frontal systems and greater cloud cover are now limiting solar heating and convective uplift, moderating highs relative to recent clear-sky extremes. Ensemble model consensus supports this cooling trend, with minor uncertainties in exact cloud thickness, shower timing, and wind-driven mixing creating the narrow spread among 24–26°C outcomes. Official resolution will rely on verified station maxima from sources like Heathrow or Kew Gardens.
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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