Recent Met Office guidance indicates a minimum temperature near 19°C for London on August 17 under mostly clear to partly cloudy skies with light winds, consistent with an unusually warm summer trajectory already 1.9°C above the 1991–2020 average through mid-August. Ensemble model spreads from the Met Office and ECMWF show nocturnal radiative cooling limited by residual warmth and urban heat-island effects, producing a tight cluster of outcomes between 18–20°C that accounts for the market’s narrow distribution. Minor variations in cloud cover, boundary-layer moisture, or local wind shifts over the next 48 hours remain the dominant sources of forecast uncertainty ahead of the final observational minimum.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in London on August 17?
Lowest temperature in London on August 17?
18°C 34%
19°C 23%
20°C 22%
17°C 17%
NEW
NEW
Aug 17, 2026
13°C or below
1%
14°C
1%
15°C
3%
16°C
7%
17°C
17%
18°C
35%
19°C
23%
20°C
22%
21°C
6%
22°C
1%
23°C or higher
<1%
18°C 34%
19°C 23%
20°C 22%
17°C 17%
NEW
NEW
Aug 17, 2026
13°C or below
$20 Vol.
1%
14°C
$5 Vol.
1%
15°C
$5 Vol.
3%
16°C
$20 Vol.
7%
17°C
$82 Vol.
17%
18°C
$120 Vol.
35%
19°C
$390 Vol.
23%
20°C
$659 Vol.
22%
21°C
$25 Vol.
6%
22°C
$5 Vol.
1%
23°C or higher
$40 Vol.
<1%
This market will resolve based on the lowest 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 lowest 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 lowest 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 guidance indicates a minimum temperature near 19°C for London on August 17 under mostly clear to partly cloudy skies with light winds, consistent with an unusually warm summer trajectory already 1.9°C above the 1991–2020 average through mid-August. Ensemble model spreads from the Met Office and ECMWF show nocturnal radiative cooling limited by residual warmth and urban heat-island effects, producing a tight cluster of outcomes between 18–20°C that accounts for the market’s narrow distribution. Minor variations in cloud cover, boundary-layer moisture, or local wind shifts over the next 48 hours remain the dominant sources of forecast uncertainty ahead of the final observational minimum.
This market will resolve based on the lowest 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 lowest 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 lowest 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 lowest 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 lowest 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, 12:28 AM ET
Volume
$1,363End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 12:28 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...This market will resolve based on the lowest 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 lowest 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 lowest 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 guidance indicates a minimum temperature near 19°C for London on August 17 under mostly clear to partly cloudy skies with light winds, consistent with an unusually warm summer trajectory already 1.9°C above the 1991–2020 average through mid-August. Ensemble model spreads from the Met Office and ECMWF show nocturnal radiative cooling limited by residual warmth and urban heat-island effects, producing a tight cluster of outcomes between 18–20°C that accounts for the market’s narrow distribution. Minor variations in cloud cover, boundary-layer moisture, or local wind shifts over the next 48 hours remain the dominant sources of forecast uncertainty ahead of the final observational minimum.
This market will resolve based on the lowest 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 lowest 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 lowest 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 lowest 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 lowest 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
$1,363End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 12:28 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Recent Met Office guidance indicates a minimum temperature near 19°C for London on August 17 under mostly clear to partly cloudy skies with light winds, consistent with an unusually warm summer trajectory already 1.9°C above the 1991–2020 average through mid-August. Ensemble model spreads from the Met Office and ECMWF show nocturnal radiative cooling limited by residual warmth and urban heat-island effects, producing a tight cluster of outcomes between 18–20°C that accounts for the market’s narrow distribution. Minor variations in cloud cover, boundary-layer moisture, or local wind shifts over the next 48 hours remain the dominant sources of forecast uncertainty ahead of the final observational minimum.
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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