Trader sentiment hinges on ensemble weather model consensus projecting London's March 27 maximum temperature at 12-13°C, with ECMWF and UK Met Office runs clustering around 12.5°C amid mild high-pressure ridging over the UK. The near-tie between 13°C (29.5%) and 12°C (28.5%) reflects subtle rounding discrepancies in probabilistic outputs, as slight increases in solar insolation or reduced cloud cover could nudge toward 14°C (16%), while persistent stratiform clouds favor 11-12°C. Historical data shows March 27 averages 11.8°C at Heathrow, but recent stratospheric warming signals have amplified shortwave forecast uncertainty; traders await 00Z GFS updates for potential shifts from northerly airflow. Extremes remain improbable given climatological baselines.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 27?
Highest temperature in London on March 27?
12°C 29%
13°C 28%
14°C 16%
11°C 15%
$11,464 Vol.
$11,464 Vol.
8°C or below
<1%
9°C
3%
10°C
7%
11°C
15%
12°C
29%
13°C
28%
14°C
16%
15°C
5%
16°C
2%
17°C
2%
18°C or higher
1%
12°C 29%
13°C 28%
14°C 16%
11°C 15%
$11,464 Vol.
$11,464 Vol.
8°C or below
<1%
9°C
3%
10°C
7%
11°C
15%
12°C
29%
13°C
28%
14°C
16%
15°C
5%
16°C
2%
17°C
2%
18°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 23, 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 hinges on ensemble weather model consensus projecting London's March 27 maximum temperature at 12-13°C, with ECMWF and UK Met Office runs clustering around 12.5°C amid mild high-pressure ridging over the UK. The near-tie between 13°C (29.5%) and 12°C (28.5%) reflects subtle rounding discrepancies in probabilistic outputs, as slight increases in solar insolation or reduced cloud cover could nudge toward 14°C (16%), while persistent stratiform clouds favor 11-12°C. Historical data shows March 27 averages 11.8°C at Heathrow, but recent stratospheric warming signals have amplified shortwave forecast uncertainty; traders await 00Z GFS updates for potential shifts from northerly airflow. Extremes remain improbable given climatological baselines.
Experimental AI-generated summary referencing Polymarket data · Updated
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