Trader consensus clusters tightly around 10–12°C maxima for London on March 28, driven by ensemble forecasts from the ECMWF and UK Met Office centering on 11°C, with spreads of 8–14°C reflecting late-spring uncertainty from variable jet stream positioning and Atlantic inflows. Recent model runs indicate a slight cooling bias from persistent low-pressure troughs and recent rainfall enhancing soil moisture evaporation, which caps daytime heating and favors 10–11°C over 12°C; historical March data at Heathrow Observatory averages 11°C highs, but cloud cover and potential sea breezes could differentiate outcomes by 1–2°C. Upcoming 12Z forecast updates may shift implied probabilities further.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 28?
Highest temperature in London on March 28?
11°C 29%
10°C 27%
12°C 21%
9°C 14%
6°C or below
2%
7°C
2%
8°C
4%
9°C
14%
10°C
27%
11°C
29%
12°C
21%
13°C
7%
14°C
3%
15°C
3%
16°C or higher
2%
11°C 29%
10°C 27%
12°C 21%
9°C 14%
6°C or below
2%
7°C
2%
8°C
4%
9°C
14%
10°C
27%
11°C
29%
12°C
21%
13°C
7%
14°C
3%
15°C
3%
16°C or higher
2%
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 24, 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 clusters tightly around 10–12°C maxima for London on March 28, driven by ensemble forecasts from the ECMWF and UK Met Office centering on 11°C, with spreads of 8–14°C reflecting late-spring uncertainty from variable jet stream positioning and Atlantic inflows. Recent model runs indicate a slight cooling bias from persistent low-pressure troughs and recent rainfall enhancing soil moisture evaporation, which caps daytime heating and favors 10–11°C over 12°C; historical March data at Heathrow Observatory averages 11°C highs, but cloud cover and potential sea breezes could differentiate outcomes by 1–2°C. Upcoming 12Z forecast updates may shift implied probabilities further.
Experimental AI-generated summary referencing Polymarket data · Updated

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