Met Office observations from London City Airport confirm the highest temperature on April 21 reached exactly 14°C multiple times between noon and late afternoon, driving trader consensus to 100% on this outcome amid cool, dry conditions following early April's heatwave peak of 26.5°C at Kew Gardens. Brisk easterly winds and lingering low cloud in eastern areas suppressed warming potential, aligning with pre-event forecast model runs projecting maxima around 14°C under high-pressure breakdown and onshore flow. This positioning is bolstered by standardized hourly measurements at the resolution station, with negligible risk of challenge barring rare data corrections or station discrepancies from sites like Heathrow.
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 21?
Highest temperature in London on April 21?
14°C 100.0%
8°C or below <1%
9°C <1%
10°C <1%
$275,955 Vol.
$275,955 Vol.
Apr 21, 2026
8°C or below
No
9°C
No
10°C
No
11°C
No
12°C
No
13°C
No
14°C
Yes
15°C
No
16°C
No
17°C
No
18°C or higher
No
14°C 100.0%
8°C or below <1%
9°C <1%
10°C <1%
$275,955 Vol.
$275,955 Vol.
Apr 21, 2026
8°C or below
$3,086 Vol.
No
9°C
$2,294 Vol.
No
10°C
$8,592 Vol.
No
11°C
$11,538 Vol.
No
12°C
$61,662 Vol.
No
13°C
$77,364 Vol.
No
14°C
$42,429 Vol.
Yes
15°C
$33,106 Vol.
No
16°C
$17,109 Vol.
No
17°C
$11,476 Vol.
No
18°C or higher
$7,299 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 21 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.Met Office observations from London City Airport confirm the highest temperature on April 21 reached exactly 14°C multiple times between noon and late afternoon, driving trader consensus to 100% on this outcome amid cool, dry conditions following early April's heatwave peak of 26.5°C at Kew Gardens. Brisk easterly winds and lingering low cloud in eastern areas suppressed warming potential, aligning with pre-event forecast model runs projecting maxima around 14°C under high-pressure breakdown and onshore flow. This positioning is bolstered by standardized hourly measurements at the resolution station, with negligible risk of challenge barring rare data corrections or station discrepancies from sites like Heathrow.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 21 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 19, 2026, 12:06 AM ET
Volume
$275,955End Date
Apr 21, 2026Market Opened
Apr 19, 2026, 12:06 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 21 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.Met Office observations from London City Airport confirm the highest temperature on April 21 reached exactly 14°C multiple times between noon and late afternoon, driving trader consensus to 100% on this outcome amid cool, dry conditions following early April's heatwave peak of 26.5°C at Kew Gardens. Brisk easterly winds and lingering low cloud in eastern areas suppressed warming potential, aligning with pre-event forecast model runs projecting maxima around 14°C under high-pressure breakdown and onshore flow. This positioning is bolstered by standardized hourly measurements at the resolution station, with negligible risk of challenge barring rare data corrections or station discrepancies from sites like Heathrow.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 21 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
$275,955End Date
Apr 21, 2026Market Opened
Apr 19, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Met Office observations from London City Airport confirm the highest temperature on April 21 reached exactly 14°C multiple times between noon and late afternoon, driving trader consensus to 100% on this outcome amid cool, dry conditions following early April's heatwave peak of 26.5°C at Kew Gardens. Brisk easterly winds and lingering low cloud in eastern areas suppressed warming potential, aligning with pre-event forecast model runs projecting maxima around 14°C under high-pressure breakdown and onshore flow. This positioning is bolstered by standardized hourly measurements at the resolution station, with negligible risk of challenge barring rare data corrections or station discrepancies from sites like Heathrow.
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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