Trader sentiment clusters tightly around 9–11°C for London's highest temperature on March 25, driven by the latest Met Office and ECMWF ensemble forecasts showing ensemble means near 10°C amid mild Atlantic westerlies. These models project partial cloud cover limiting peaks above 11°C, while southerly flow edges out 9°C via slight insolation boosts during brief sunny intervals. Historical late-March highs average 10.5°C at Heathrow, with recent GFS runs reinforcing this via weak high-pressure ridging. A potential cold snap risk from northern airflow remains low at under 2%, but the 12Z model update could shift odds if upper-level troughs deepen.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 25?
Highest temperature in London on March 25?
10°C 27%
9°C 27%
11°C 23%
12°C 17%
5°C or below
<1%
6°C
<1%
7°C
1%
8°C
10%
9°C
27%
10°C
27%
11°C
23%
12°C
17%
13°C
5%
14°C
3%
15°C or higher
1%
10°C 27%
9°C 27%
11°C 23%
12°C 17%
5°C or below
<1%
6°C
<1%
7°C
1%
8°C
10%
9°C
27%
10°C
27%
11°C
23%
12°C
17%
13°C
5%
14°C
3%
15°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 21, 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 sentiment clusters tightly around 9–11°C for London's highest temperature on March 25, driven by the latest Met Office and ECMWF ensemble forecasts showing ensemble means near 10°C amid mild Atlantic westerlies. These models project partial cloud cover limiting peaks above 11°C, while southerly flow edges out 9°C via slight insolation boosts during brief sunny intervals. Historical late-March highs average 10.5°C at Heathrow, with recent GFS runs reinforcing this via weak high-pressure ridging. A potential cold snap risk from northern airflow remains low at under 2%, but the 12Z model update could shift odds if upper-level troughs deepen.
Experimental AI-generated summary referencing Polymarket data · Updated
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