Met Office observations from London City Airport and Heathrow Airport—the key stations for this market—confirm the highest temperature on April 19 reached exactly 15°C amid persistent low cloud cover and cool northerly winds that suppressed daytime heating. This aligns with trader consensus at nearly 100% implied probability, reflecting verified hourly data rather than forecasts, following a sharp cooldown from early April's record 26.6°C peak on the 9th under high pressure. Scenarios challenging this would require rare post hoc data revisions from official sources, such as equipment recalibrations, though such adjustments are exceedingly uncommon for settled daily maxima. No further updates expected as the market nears 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 19?
Highest temperature in London on April 19?
15°C 100.0%
9°C or below <1%
10°C <1%
11°C <1%
$260,699 Vol.
$260,699 Vol.
Apr 19, 2026
9°C or below
No
10°C
No
11°C
No
12°C
No
13°C
No
14°C
No
15°C
Yes
16°C
No
17°C
No
18°C
No
19°C or higher
No
15°C 100.0%
9°C or below <1%
10°C <1%
11°C <1%
$260,699 Vol.
$260,699 Vol.
Apr 19, 2026
9°C or below
$5,791 Vol.
No
10°C
$10,359 Vol.
No
11°C
$13,060 Vol.
No
12°C
$11,505 Vol.
No
13°C
$18,160 Vol.
No
14°C
$75,766 Vol.
No
15°C
$32,805 Vol.
Yes
16°C
$43,530 Vol.
No
17°C
$22,191 Vol.
No
18°C
$14,394 Vol.
No
19°C or higher
$13,138 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 19 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 and Heathrow Airport—the key stations for this market—confirm the highest temperature on April 19 reached exactly 15°C amid persistent low cloud cover and cool northerly winds that suppressed daytime heating. This aligns with trader consensus at nearly 100% implied probability, reflecting verified hourly data rather than forecasts, following a sharp cooldown from early April's record 26.6°C peak on the 9th under high pressure. Scenarios challenging this would require rare post hoc data revisions from official sources, such as equipment recalibrations, though such adjustments are exceedingly uncommon for settled daily maxima. No further updates expected as the market nears 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 19 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 17, 2026, 12:05 AM ET
Volume
$260,699End Date
Apr 19, 2026Market Opened
Apr 17, 2026, 12:05 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 19 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 and Heathrow Airport—the key stations for this market—confirm the highest temperature on April 19 reached exactly 15°C amid persistent low cloud cover and cool northerly winds that suppressed daytime heating. This aligns with trader consensus at nearly 100% implied probability, reflecting verified hourly data rather than forecasts, following a sharp cooldown from early April's record 26.6°C peak on the 9th under high pressure. Scenarios challenging this would require rare post hoc data revisions from official sources, such as equipment recalibrations, though such adjustments are exceedingly uncommon for settled daily maxima. No further updates expected as the market nears 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 19 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
$260,699End Date
Apr 19, 2026Market Opened
Apr 17, 2026, 12:05 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 and Heathrow Airport—the key stations for this market—confirm the highest temperature on April 19 reached exactly 15°C amid persistent low cloud cover and cool northerly winds that suppressed daytime heating. This aligns with trader consensus at nearly 100% implied probability, reflecting verified hourly data rather than forecasts, following a sharp cooldown from early April's record 26.6°C peak on the 9th under high pressure. Scenarios challenging this would require rare post hoc data revisions from official sources, such as equipment recalibrations, though such adjustments are exceedingly uncommon for settled daily maxima. No further updates expected as the market nears 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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