Latest Met Office ensemble forecasts point to a high of 12°C in London on March 27, driving trader consensus with 12°C at 43% implied probability and 13°C at 31%, as cloud cover and showers from an Atlantic low-pressure system cap temperatures. Recent model runs from ECMWF and UKMO have converged downward since March 24, incorporating observed cold air advection and strengthened northerly winds, shifting earlier projections of 14°C lower amid unsettled spring patterns. March climatology supports this, with historical highs averaging 11.5°C, though ensemble spreads allow for 11–14°C variability based on timing of any breaks in cloud. Hourly observations from Heathrow and official stations will finalize the peak temperature by evening.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 27?
Highest temperature in London on March 27?
12°C 43%
13°C 33%
11°C 17%
14°C 6%
$62,314 Vol.
$62,314 Vol.
8°C or below
<1%
9°C
<1%
10°C
3%
11°C
17%
12°C
43%
13°C
33%
14°C
6%
15°C
1%
16°C
<1%
17°C
<1%
18°C or higher
<1%
12°C 43%
13°C 33%
11°C 17%
14°C 6%
$62,314 Vol.
$62,314 Vol.
8°C or below
<1%
9°C
<1%
10°C
3%
11°C
17%
12°C
43%
13°C
33%
14°C
6%
15°C
1%
16°C
<1%
17°C
<1%
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...Latest Met Office ensemble forecasts point to a high of 12°C in London on March 27, driving trader consensus with 12°C at 43% implied probability and 13°C at 31%, as cloud cover and showers from an Atlantic low-pressure system cap temperatures. Recent model runs from ECMWF and UKMO have converged downward since March 24, incorporating observed cold air advection and strengthened northerly winds, shifting earlier projections of 14°C lower amid unsettled spring patterns. March climatology supports this, with historical highs averaging 11.5°C, though ensemble spreads allow for 11–14°C variability based on timing of any breaks in cloud. Hourly observations from Heathrow and official stations will finalize the peak temperature by evening.
Experimental AI-generated summary referencing Polymarket data · Updated
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