Official Met Office observations confirm the highest temperature in London on April 23, 2026, reached 18°C at St James's Park station, driving trader consensus to a 100% implied probability for this outcome and near-zero odds for higher readings. This peak aligned with partly cloudy conditions, light southerly winds, and above-average late-April warmth—about 3–5°C warmer than the 13–15°C climatological norm—following an early-month heat spike to 26.6°C in Kew Gardens on April 8 but moderated by recent cooler Atlantic inflows. Forecast models from the prior day had projected highs around 16–19°C, matching the outcome closely. With provisional data now finalized across key sites like Heathrow and Northolt, revision risks are negligible barring anomalous late reports, securing 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 April 23?
Highest temperature in London on April 23?
18°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$416,830 Vol.
$416,830 Vol.
Apr 23, 2026
13°C or below
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
Yes
19°C
No
20°C
No
21°C
No
22°C
No
23°C or higher
No
18°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$416,830 Vol.
$416,830 Vol.
Apr 23, 2026
13°C or below
$33,483 Vol.
No
14°C
$25,708 Vol.
No
15°C
$38,513 Vol.
No
16°C
$67,032 Vol.
No
17°C
$95,067 Vol.
No
18°C
$47,801 Vol.
Yes
19°C
$47,821 Vol.
No
20°C
$20,393 Vol.
No
21°C
$19,080 Vol.
No
22°C
$10,457 Vol.
No
23°C or higher
$11,474 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 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the London City Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Official Met Office observations confirm the highest temperature in London on April 23, 2026, reached 18°C at St James's Park station, driving trader consensus to a 100% implied probability for this outcome and near-zero odds for higher readings. This peak aligned with partly cloudy conditions, light southerly winds, and above-average late-April warmth—about 3–5°C warmer than the 13–15°C climatological norm—following an early-month heat spike to 26.6°C in Kew Gardens on April 8 but moderated by recent cooler Atlantic inflows. Forecast models from the prior day had projected highs around 16–19°C, matching the outcome closely. With provisional data now finalized across key sites like Heathrow and Northolt, revision risks are negligible barring anomalous late reports, securing market 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 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the London City Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the London City Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Apr 21, 2026, 12:07 AM ET
Volume
$416,830End Date
Apr 23, 2026Market Opened
Apr 21, 2026, 12:07 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 to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 23 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the London City Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Official Met Office observations confirm the highest temperature in London on April 23, 2026, reached 18°C at St James's Park station, driving trader consensus to a 100% implied probability for this outcome and near-zero odds for higher readings. This peak aligned with partly cloudy conditions, light southerly winds, and above-average late-April warmth—about 3–5°C warmer than the 13–15°C climatological norm—following an early-month heat spike to 26.6°C in Kew Gardens on April 8 but moderated by recent cooler Atlantic inflows. Forecast models from the prior day had projected highs around 16–19°C, matching the outcome closely. With provisional data now finalized across key sites like Heathrow and Northolt, revision risks are negligible barring anomalous late reports, securing market 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 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the London City Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the London City Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Volume
$416,830End Date
Apr 23, 2026Market Opened
Apr 21, 2026, 12:07 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 confirm the highest temperature in London on April 23, 2026, reached 18°C at St James's Park station, driving trader consensus to a 100% implied probability for this outcome and near-zero odds for higher readings. This peak aligned with partly cloudy conditions, light southerly winds, and above-average late-April warmth—about 3–5°C warmer than the 13–15°C climatological norm—following an early-month heat spike to 26.6°C in Kew Gardens on April 8 but moderated by recent cooler Atlantic inflows. Forecast models from the prior day had projected highs around 16–19°C, matching the outcome closely. With provisional data now finalized across key sites like Heathrow and Northolt, revision risks are negligible barring anomalous late reports, securing 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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