**Current Met Office guidance and ensemble model runs position London’s maximum temperature on August 17, 2026, near 25–27 °C.** Daytime highs are expected to reach 27 °C under hazy sunshine and light southerly flow, while increasing cloud and a shift toward unsettled Atlantic air may cap readings at 25–26 °C at official stations such as London Heathrow or St James’s Park. Urban heat-island effects and boundary-layer moisture further tighten the likely range. Recent model consensus shows limited spread around these values, reflecting a transitional pattern after a warmer-than-average summer. No strong ridge or heat advection is forecast, keeping probabilities for 28 °C or higher low and suppressing colder outcomes below 24 °C. Updated runs overnight or early on the 17th will provide the final observational constraint ahead of market 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 17?
Highest temperature in London on August 17?
26°C 40%
25°C 28%
27°C 22%
24°C 7%
NEW
NEW
Aug 17, 2026
20°C or below
<1%
21°C
<1%
22°C
<1%
23°C
1%
24°C
7%
25°C
28%
26°C
40%
27°C
22%
28°C
6%
29°C
2%
30°C or higher
<1%
26°C 40%
25°C 28%
27°C 22%
24°C 7%
NEW
NEW
Aug 17, 2026
20°C or below
$238 Vol.
<1%
21°C
$125 Vol.
<1%
22°C
$112 Vol.
<1%
23°C
$1,144 Vol.
1%
24°C
$438 Vol.
7%
25°C
$2,433 Vol.
28%
26°C
$1,448 Vol.
40%
27°C
$2,092 Vol.
22%
28°C
$808 Vol.
6%
29°C
$394 Vol.
2%
30°C or higher
$272 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 17 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 Met Office guidance and ensemble model runs position London’s maximum temperature on August 17, 2026, near 25–27 °C.** Daytime highs are expected to reach 27 °C under hazy sunshine and light southerly flow, while increasing cloud and a shift toward unsettled Atlantic air may cap readings at 25–26 °C at official stations such as London Heathrow or St James’s Park. Urban heat-island effects and boundary-layer moisture further tighten the likely range.
Recent model consensus shows limited spread around these values, reflecting a transitional pattern after a warmer-than-average summer. No strong ridge or heat advection is forecast, keeping probabilities for 28 °C or higher low and suppressing colder outcomes below 24 °C. Updated runs overnight or early on the 17th will provide the final observational constraint ahead of market 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 17 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 17 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 15, 2026, 4:04 PM ET
Volume
$9,504End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 4:04 PM 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 17 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 Met Office guidance and ensemble model runs position London’s maximum temperature on August 17, 2026, near 25–27 °C.** Daytime highs are expected to reach 27 °C under hazy sunshine and light southerly flow, while increasing cloud and a shift toward unsettled Atlantic air may cap readings at 25–26 °C at official stations such as London Heathrow or St James’s Park. Urban heat-island effects and boundary-layer moisture further tighten the likely range.
Recent model consensus shows limited spread around these values, reflecting a transitional pattern after a warmer-than-average summer. No strong ridge or heat advection is forecast, keeping probabilities for 28 °C or higher low and suppressing colder outcomes below 24 °C. Updated runs overnight or early on the 17th will provide the final observational constraint ahead of market 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 17 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 17 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
$9,504End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 4:04 PM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...**Current Met Office guidance and ensemble model runs position London’s maximum temperature on August 17, 2026, near 25–27 °C.** Daytime highs are expected to reach 27 °C under hazy sunshine and light southerly flow, while increasing cloud and a shift toward unsettled Atlantic air may cap readings at 25–26 °C at official stations such as London Heathrow or St James’s Park. Urban heat-island effects and boundary-layer moisture further tighten the likely range. Recent model consensus shows limited spread around these values, reflecting a transitional pattern after a warmer-than-average summer. No strong ridge or heat advection is forecast, keeping probabilities for 28 °C or higher low and suppressing colder outcomes below 24 °C. Updated runs overnight or early on the 17th will provide the final observational constraint ahead of market 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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