Official Met Office observations from London stations, including Heathrow, recorded a minimum temperature of 19°C on August 17, 2026, driving the market's complete consensus at that outcome. Mild overnight conditions under hazy sunshine, light northwesterly winds, and residual warmth from a record-warm summer kept radiative cooling limited, aligning with forecast model guidance showing lows near 17–19°C rather than typical seasonal values around 14–15°C. This outcome reflects the tight clustering of ensemble predictions and real-time surface data, with urban heat-island effects further moderating minima. Only an unforeseen revision to official station records or a change in resolution criteria could realistically shift the result, though such adjustments are rare once preliminary figures are validated.
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?
19°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$20,725 Vol.
$20,725 Vol.
Aug 17, 2026
13°C or below
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
Yes
20°C
No
21°C
No
22°C
No
23°C or higher
No
19°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$20,725 Vol.
$20,725 Vol.
Aug 17, 2026
13°C or below
$167 Vol.
No
14°C
$247 Vol.
No
15°C
$1,816 Vol.
No
16°C
$236 Vol.
No
17°C
$2,573 Vol.
No
18°C
$4,786 Vol.
No
19°C
$3,214 Vol.
Yes
20°C
$5,434 Vol.
No
21°C
$1,286 Vol.
No
22°C
$516 Vol.
No
23°C or higher
$450 Vol.
No
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.Official Met Office observations from London stations, including Heathrow, recorded a minimum temperature of 19°C on August 17, 2026, driving the market's complete consensus at that outcome. Mild overnight conditions under hazy sunshine, light northwesterly winds, and residual warmth from a record-warm summer kept radiative cooling limited, aligning with forecast model guidance showing lows near 17–19°C rather than typical seasonal values around 14–15°C. This outcome reflects the tight clustering of ensemble predictions and real-time surface data, with urban heat-island effects further moderating minima. Only an unforeseen revision to official station records or a change in resolution criteria could realistically shift the result, though such adjustments are rare once preliminary figures are validated.
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
$20,725End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 12:28 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 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.Official Met Office observations from London stations, including Heathrow, recorded a minimum temperature of 19°C on August 17, 2026, driving the market's complete consensus at that outcome. Mild overnight conditions under hazy sunshine, light northwesterly winds, and residual warmth from a record-warm summer kept radiative cooling limited, aligning with forecast model guidance showing lows near 17–19°C rather than typical seasonal values around 14–15°C. This outcome reflects the tight clustering of ensemble predictions and real-time surface data, with urban heat-island effects further moderating minima. Only an unforeseen revision to official station records or a change in resolution criteria could realistically shift the result, though such adjustments are rare once preliminary figures are validated.
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
$20,725End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 12:28 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 Heathrow, recorded a minimum temperature of 19°C on August 17, 2026, driving the market's complete consensus at that outcome. Mild overnight conditions under hazy sunshine, light northwesterly winds, and residual warmth from a record-warm summer kept radiative cooling limited, aligning with forecast model guidance showing lows near 17–19°C rather than typical seasonal values around 14–15°C. This outcome reflects the tight clustering of ensemble predictions and real-time surface data, with urban heat-island effects further moderating minima. Only an unforeseen revision to official station records or a change in resolution criteria could realistically shift the result, though such adjustments are rare once preliminary figures are validated.
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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