A strengthening high-pressure system and associated heat dome are driving the current market positioning, with official Met Office guidance and ensemble model runs from the European Centre for Medium-Range Weather Forecasts pointing to peak temperatures of 34–38 °C across London on 23 June. Warm advection from the near-continent, combined with clear skies and light winds, favors rapid daytime warming, while recent amber heat-health alerts reflect growing model consensus that 35 °C will be exceeded. Forecaster updates in the past 48 hours have nudged higher-end scenarios toward 37–38 °C in parts of the southeast, yet spread among runs leaves room for a lower outcome if cloud or a slightly stronger sea breeze develops. Final guidance from the Met Office and updated high-resolution runs on 22 June will be the key catalysts likely to shift trader probabilities before 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 June 23?
Highest temperature in London on June 23?
32°C or below 100.0%
33°C <1%
34°C <1%
35°C <1%
$291,597 Vol.
$291,597 Vol.
Jun 23, 2026
32°C or below
Yes
33°C
No
34°C
No
35°C
No
36°C
No
37°C
No
38°C
No
39°C
No
40°C
No
41°C
No
42°C or higher
No
32°C or below 100.0%
33°C <1%
34°C <1%
35°C <1%
$291,597 Vol.
$291,597 Vol.
Jun 23, 2026
32°C or below
$80,592 Vol.
Yes
33°C
$30,687 Vol.
No
34°C
$46,932 Vol.
No
35°C
$37,585 Vol.
No
36°C
$27,225 Vol.
No
37°C
$22,769 Vol.
No
38°C
$22,279 Vol.
No
39°C
$9,832 Vol.
No
40°C
$6,234 Vol.
No
41°C
$3,728 Vol.
No
42°C or higher
$3,734 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 23 Jun '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.A strengthening high-pressure system and associated heat dome are driving the current market positioning, with official Met Office guidance and ensemble model runs from the European Centre for Medium-Range Weather Forecasts pointing to peak temperatures of 34–38 °C across London on 23 June. Warm advection from the near-continent, combined with clear skies and light winds, favors rapid daytime warming, while recent amber heat-health alerts reflect growing model consensus that 35 °C will be exceeded. Forecaster updates in the past 48 hours have nudged higher-end scenarios toward 37–38 °C in parts of the southeast, yet spread among runs leaves room for a lower outcome if cloud or a slightly stronger sea breeze develops. Final guidance from the Met Office and updated high-resolution runs on 22 June will be the key catalysts likely to shift trader probabilities before resolution.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 23 Jun '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.
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: Jun 21, 2026, 12:04 AM ET
Volume
$291,597End Date
Jun 23, 2026Market Opened
Jun 21, 2026, 12:04 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 23 Jun '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.A strengthening high-pressure system and associated heat dome are driving the current market positioning, with official Met Office guidance and ensemble model runs from the European Centre for Medium-Range Weather Forecasts pointing to peak temperatures of 34–38 °C across London on 23 June. Warm advection from the near-continent, combined with clear skies and light winds, favors rapid daytime warming, while recent amber heat-health alerts reflect growing model consensus that 35 °C will be exceeded. Forecaster updates in the past 48 hours have nudged higher-end scenarios toward 37–38 °C in parts of the southeast, yet spread among runs leaves room for a lower outcome if cloud or a slightly stronger sea breeze develops. Final guidance from the Met Office and updated high-resolution runs on 22 June will be the key catalysts likely to shift trader probabilities before resolution.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 23 Jun '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.
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
$291,597End Date
Jun 23, 2026Market Opened
Jun 21, 2026, 12:04 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
A strengthening high-pressure system and associated heat dome are driving the current market positioning, with official Met Office guidance and ensemble model runs from the European Centre for Medium-Range Weather Forecasts pointing to peak temperatures of 34–38 °C across London on 23 June. Warm advection from the near-continent, combined with clear skies and light winds, favors rapid daytime warming, while recent amber heat-health alerts reflect growing model consensus that 35 °C will be exceeded. Forecaster updates in the past 48 hours have nudged higher-end scenarios toward 37–38 °C in parts of the southeast, yet spread among runs leaves room for a lower outcome if cloud or a slightly stronger sea breeze develops. Final guidance from the Met Office and updated high-resolution runs on 22 June will be the key catalysts likely to shift trader probabilities before 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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