Trader consensus on Polymarket has locked in 100% implied probability for a highest temperature of 19°C in London on April 30, driven by the Met Office's official daily records confirming this maximum at key monitoring stations like Heathrow Airport, under mild spring conditions with partial cloud cover limiting solar heating. Synoptic charts showed a weak high-pressure ridge over the UK, suppressing temperatures below 20°C amid light winds and average humidity, consistent with April climatology where daily highs rarely exceed 20°C absent heatwaves. Realistic challenges would require a post hoc data audit revealing measurement errors at secondary sites or unverified outlier readings, though such revisions are exceedingly rare in verified meteorological datasets; final resolution awaits any late updates from the Met Office.
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 30?
Highest temperature in London on April 30?
19°C 100.0%
12°C or below <1%
13°C <1%
14°C <1%
$446,559 Vol.
$446,559 Vol.
Apr 30, 2026
12°C or below
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
Yes
20°C
No
21°C
No
22°C or higher
No
19°C 100.0%
12°C or below <1%
13°C <1%
14°C <1%
$446,559 Vol.
$446,559 Vol.
Apr 30, 2026
12°C or below
$9,102 Vol.
No
13°C
$17,366 Vol.
No
14°C
$7,268 Vol.
No
15°C
$16,540 Vol.
No
16°C
$20,544 Vol.
No
17°C
$109,801 Vol.
No
18°C
$123,119 Vol.
No
19°C
$47,644 Vol.
Yes
20°C
$38,621 Vol.
No
21°C
$30,867 Vol.
No
22°C or higher
$25,687 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 30 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.Trader consensus on Polymarket has locked in 100% implied probability for a highest temperature of 19°C in London on April 30, driven by the Met Office's official daily records confirming this maximum at key monitoring stations like Heathrow Airport, under mild spring conditions with partial cloud cover limiting solar heating. Synoptic charts showed a weak high-pressure ridge over the UK, suppressing temperatures below 20°C amid light winds and average humidity, consistent with April climatology where daily highs rarely exceed 20°C absent heatwaves. Realistic challenges would require a post hoc data audit revealing measurement errors at secondary sites or unverified outlier readings, though such revisions are exceedingly rare in verified meteorological datasets; final resolution awaits any late updates from the Met Office.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 30 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 28, 2026, 2:01 PM ET
Volume
$446,559End Date
Apr 30, 2026Market Opened
Apr 28, 2026, 2:01 PM 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 30 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.Trader consensus on Polymarket has locked in 100% implied probability for a highest temperature of 19°C in London on April 30, driven by the Met Office's official daily records confirming this maximum at key monitoring stations like Heathrow Airport, under mild spring conditions with partial cloud cover limiting solar heating. Synoptic charts showed a weak high-pressure ridge over the UK, suppressing temperatures below 20°C amid light winds and average humidity, consistent with April climatology where daily highs rarely exceed 20°C absent heatwaves. Realistic challenges would require a post hoc data audit revealing measurement errors at secondary sites or unverified outlier readings, though such revisions are exceedingly rare in verified meteorological datasets; final resolution awaits any late updates from the Met Office.
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 30 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
$446,559End Date
Apr 30, 2026Market Opened
Apr 28, 2026, 2:01 PM ETResolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Trader consensus on Polymarket has locked in 100% implied probability for a highest temperature of 19°C in London on April 30, driven by the Met Office's official daily records confirming this maximum at key monitoring stations like Heathrow Airport, under mild spring conditions with partial cloud cover limiting solar heating. Synoptic charts showed a weak high-pressure ridge over the UK, suppressing temperatures below 20°C amid light winds and average humidity, consistent with April climatology where daily highs rarely exceed 20°C absent heatwaves. Realistic challenges would require a post hoc data audit revealing measurement errors at secondary sites or unverified outlier readings, though such revisions are exceedingly rare in verified meteorological datasets; final resolution awaits any late updates from the Met Office.
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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