Trader consensus on Polymarket heavily favors 14°C (35%) as London's highest temperature on March 23, driven by the latest UK Met Office and ECMWF ensemble forecasts converging on 13-15°C amid a mild Atlantic airflow and weak high-pressure influence. Recent observations confirm this trend, with March 22 highs reaching 12-13°C under partly cloudy skies, aligning with seasonal norms of 11-13°C but elevated by persistent southerly winds displacing colder air. Lower probabilities for extremes reflect model stability, minimal convective activity, and no signals of unusual warming or cold snaps, though slight uncertainty persists from diurnal variations and urban heat effects in central London. Final hourly data from Heathrow will resolve the market.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 23?
Highest temperature in London on March 23?
14°C 36%
15°C 24%
16°C 18.8%
13°C 18%
$29,835 Vol.
$29,835 Vol.
9°C or below
<1%
10°C
<1%
11°C
<1%
12°C
2%
13°C
18%
14°C
36%
15°C
24%
16°C
19%
17°C
3%
18°C
<1%
19°C or higher
<1%
14°C 36%
15°C 24%
16°C 18.8%
13°C 18%
$29,835 Vol.
$29,835 Vol.
9°C or below
<1%
10°C
<1%
11°C
<1%
12°C
2%
13°C
18%
14°C
36%
15°C
24%
16°C
19%
17°C
3%
18°C
<1%
19°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 19, 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 heavily favors 14°C (35%) as London's highest temperature on March 23, driven by the latest UK Met Office and ECMWF ensemble forecasts converging on 13-15°C amid a mild Atlantic airflow and weak high-pressure influence. Recent observations confirm this trend, with March 22 highs reaching 12-13°C under partly cloudy skies, aligning with seasonal norms of 11-13°C but elevated by persistent southerly winds displacing colder air. Lower probabilities for extremes reflect model stability, minimal convective activity, and no signals of unusual warming or cold snaps, though slight uncertainty persists from diurnal variations and urban heat effects in central London. Final hourly data from Heathrow will resolve the market.
Experimental AI-generated summary referencing Polymarket data · Updated
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