Trader sentiment on London's highest temperature March 27 hinges on the latest Met Office and ECMWF ensemble forecasts, which cluster maxima around 12-13°C amid a mild Atlantic air mass advection, driving the tight 34.5% odds tie between these outcomes. Differentiating factors include boundary layer cloud variability—potentially capping peaks at 12°C under overcast skies versus sunnier breaks allowing 13°C—and urban heat island amplification in central London. Historical late-March highs average 11.5°C, but recent model runs show a 0.5°C spread from jet stream positioning, with 11°C and 14°C trailing as outliers reflecting drier-versus-wetter scenario divergences. Upcoming hourly updates could tip the balance before resolution.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in London on March 27?
Highest temperature in London on March 27?
13°C 35%
12°C 35%
14°C 12%
11°C 11%
$33,330 Vol.
$33,330 Vol.
8°C or below
<1%
9°C
1%
10°C
6%
11°C
11%
12°C
35%
13°C
35%
14°C
12%
15°C
7%
16°C
2%
17°C
1%
18°C or higher
<1%
13°C 35%
12°C 35%
14°C 12%
11°C 11%
$33,330 Vol.
$33,330 Vol.
8°C or below
<1%
9°C
1%
10°C
6%
11°C
11%
12°C
35%
13°C
35%
14°C
12%
15°C
7%
16°C
2%
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...Trader sentiment on London's highest temperature March 27 hinges on the latest Met Office and ECMWF ensemble forecasts, which cluster maxima around 12-13°C amid a mild Atlantic air mass advection, driving the tight 34.5% odds tie between these outcomes. Differentiating factors include boundary layer cloud variability—potentially capping peaks at 12°C under overcast skies versus sunnier breaks allowing 13°C—and urban heat island amplification in central London. Historical late-March highs average 11.5°C, but recent model runs show a 0.5°C spread from jet stream positioning, with 11°C and 14°C trailing as outliers reflecting drier-versus-wetter scenario divergences. Upcoming hourly updates could tip the balance before resolution.
Experimental AI-generated summary referencing Polymarket data · Updated
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