London Weather in December
In December, London averages a high of 8°C (46°F) and a low of 3°C (37°F), from 48 years of daily records (1971–2025).
8°C
Average high
46°F
3°C
Average low
37°F
16°C
Record high
60°F · December 18, 2015
-8°C
Record low
17°F · December 13, 1981
What December Is Like in London
- December 2024 was the 3rd warmest December in 48 years of records, 2.1°C (3.8°F) above the long-run average.
- The coldest December reading, -8°C (17°F) on December 13, 1981, has not been matched in 44 years.
- On average, 7.4 nights in December drop below freezing.
- December in London has become 0.8°C (1.4°F) warmer on average: the 2010–2024 average against 1970–1989.
At least 1 mm of rain falls on 36% of December days, and the month averages 58 mm in total.
Warmest: 2015 (12.4°C)Latest: 2024 (10.1°C)10-year averageLong-run average (7.9°C)
Look Up a Day in December
See the weather in London on any December date, year by year.
Source: NOAA GHCN-Daily, Hampstead (1971–2016); Heathrow (1986–2025). Averages cover 1971–2025. How we compute this