climate archive

London weather in 2021

In 2021, the average daily high in London was 14.4°C, 0.2° warmer than the 1991-2020 climate normal (14.2°C). 783 mm of rain fell that year, making it wetter than average (649 mm), with 2703 hours of sunshine.

Measured in London. Source: Open-Meteo historical data (ERA5 reanalysis).

Records of 2021

Warmest day: 18 Jul 2021, 29.2°C
Coldest night: 11 Feb 2021, -10.3°C
Wettest day: 20 Oct 2021, 34 mm

Day counts for 2021

Frost days (low below 0°C): 45
Ice days (high below 0°C): 2
Warm days (high 25°C or above): 13
Hot days (high 30°C or above): 0

Compared with the climate normal (1991-2020)

The climate normal for London over the 1991-2020 reference period is an average daily high of 14.2°C, 649 mm of rain and 2737 hours of sunshine per year. 2021 differed by 0.2° in temperature and 134 mm in rainfall.

Frequently asked questions

Was 2021 warmer or cooler than average in London?
2021 was 0.2° warmer than the 1991-2020 climate normal, with an average daily high of 14.4°C compared to a normal of 14.2°C.

How much rain fell in London in 2021?
London recorded 783 mm of rain in total in 2021, compared to a climate normal of 649 mm.

What was the warmest day of 2021 in London?
The warmest day of 2021 was 18 Jul 2021, reaching 29.2°C in London.

Other years