Trader consensus on Polymarket overwhelmingly backs 14°C (100%) as London's highest temperature on April 1, 2026, anchored by verified Met Office observations from central stations like St James's Park and Heathrow, which recorded a midday peak of 14°C amid mostly cloudy skies, light winds, and overnight lows near 8°C. Cool spring conditions, influenced by a weak high-pressure ridge, aligned closely with pre-event ensemble forecasts from ECMWF and GFS models clustering at 13-15°C—above the early April climatological average of 12-13°C max but below recent March highs exceeding 19°C. This skin-in-the-game positioning reflects firm observational data; realistic challenges would require rare Met Office revisions to provisional records, unlikely given standardized measurement protocols at official sites.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on April 1?
Highest temperature in London on April 1?
14°C 100.0%
15°C <1%
16°C <1%
17°C <1%
$303,846 Vol.
$303,846 Vol.
14°C
100%
15°C
<1%
16°C
<1%
17°C
<1%
18°C
<1%
19°C
<1%
20°C
<1%
21°C or higher
<1%
14°C 100.0%
15°C <1%
16°C <1%
17°C <1%
$303,846 Vol.
$303,846 Vol.
14°C
100%
15°C
<1%
16°C
<1%
17°C
<1%
18°C
<1%
19°C
<1%
20°C
<1%
21°C or higher
<1%
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: Mar 29, 2026, 3:40 PM ET
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
Dispute window
Final
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.
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Outcome proposed: No
Dispute window
Final
Trader consensus on Polymarket overwhelmingly backs 14°C (100%) as London's highest temperature on April 1, 2026, anchored by verified Met Office observations from central stations like St James's Park and Heathrow, which recorded a midday peak of 14°C amid mostly cloudy skies, light winds, and overnight lows near 8°C. Cool spring conditions, influenced by a weak high-pressure ridge, aligned closely with pre-event ensemble forecasts from ECMWF and GFS models clustering at 13-15°C—above the early April climatological average of 12-13°C max but below recent March highs exceeding 19°C. This skin-in-the-game positioning reflects firm observational data; realistic challenges would require rare Met Office revisions to provisional records, unlikely given standardized measurement protocols at official sites.
Experimental AI-generated summary referencing Polymarket data · Updated
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