London Weather in August
In August, London averages a high of 22°C (71°F) and a low of 13°C (55°F), from 48 years of daily records (1971–2025).
22°C
Average high
71°F
13°C
Average low
55°F
37°C
Record high
99°F · August 9, 2003
5°C
Record low
40°F · August 20, 1974
What August Is Like in London
- The coldest August reading, 5°C (40°F) on August 20, 1974, has not been matched in 51 years.
- August in London has become 1.2°C (2.2°F) warmer on average: the 2010–2024 average against 1970–1989.
- The warmest August in the record was 2022; the coldest was 1986.
At least 1 mm of rain falls on 27% of August days, and the month averages 64 mm in total.
Warmest: 2022 (27.2°C)Latest: 2024 (24.7°C)10-year averageLong-run average (21.9°C)
Look Up a Day in August
See the weather in London on any August date, year by year.
Source: NOAA GHCN-Daily, Hampstead (1971–2016); Heathrow (1986–2025). Averages cover 1971–2025. How we compute this