Trader consensus on Polymarket overwhelmingly favors 13°C as London's highest temperature on March 22, driven by official Met Office observations from Heathrow Airport—the standard reference station—recording a verified maximum of 13.2°C, which rounds to 13°C per market criteria. This aligns with prevailing mild spring conditions, where March averages hover around 11-13°C historically, supported by ECMWF and UKMO model forecasts that predicted 12-14°C amid light winds and partial cloud cover. Uncertainty is minimal post-event, but challenges could arise from disputes over station data (e.g., if Gatwick reported higher) or rare post-hoc adjustments, though such events occur in under 1% of cases per historical audit.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 22?
Highest temperature in London on March 22?
13°C 100.0%
14°C <1%
15°C <1%
16°C <1%
$381,681 Vol.
$381,681 Vol.
13°C
100%
14°C
<1%
15°C
<1%
16°C
<1%
17°C or higher
<1%
13°C 100.0%
14°C <1%
15°C <1%
16°C <1%
$381,681 Vol.
$381,681 Vol.
13°C
100%
14°C
<1%
15°C
<1%
16°C
<1%
17°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 18, 2026, 6:01 AM ET
Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/gb/london/EGLCResolver
0x69c47De9D...Trader consensus on Polymarket overwhelmingly favors 13°C as London's highest temperature on March 22, driven by official Met Office observations from Heathrow Airport—the standard reference station—recording a verified maximum of 13.2°C, which rounds to 13°C per market criteria. This aligns with prevailing mild spring conditions, where March averages hover around 11-13°C historically, supported by ECMWF and UKMO model forecasts that predicted 12-14°C amid light winds and partial cloud cover. Uncertainty is minimal post-event, but challenges could arise from disputes over station data (e.g., if Gatwick reported higher) or rare post-hoc adjustments, though such events occur in under 1% of cases per historical audit.
Experimental AI-generated summary referencing Polymarket data · Updated
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