Historical Weather in London, United Kingdom
See 55+ years of weather history for any date in London going back to 1970.
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Monthly Climate Averages
Historical temperature and precipitation averages for London, United Kingdom, based on 55+ years of weather data.
Temperatures shown in Celsius with Fahrenheit in parentheses. Rainfall in millimetres, snowfall in centimetres.
London Weather by Month
The coldest January reading, -12°C (11°F) on January 13, 1987, has not been matched in 38 years.
February 2024 was the warmest February in 47 years of records, 4.3°C (7.7°F) above the long-run average.
March 2024 was the 2nd warmest March in 49 years of records, 2.2°C (4.0°F) above the long-run average.
April in London has become 2.2°C (4.0°F) warmer on average: the 2011–2025 average against 1970–1989.
May 2024 was the warmest May in 48 years of records, 2.7°C (4.9°F) above the long-run average.
June in London has become 1.5°C (2.7°F) warmer on average: the 2011–2025 average against 1970–1989.
The coldest July reading, 4°C (40°F) on July 3, 1974, has not been matched in 51 years.
The coldest August reading, 5°C (40°F) on August 20, 1974, has not been matched in 51 years.
London's hottest September day on record is a recent one: 33°C (91°F) on September 9, 2023.
October in London has become 1.8°C (3.1°F) warmer on average: the 2010–2024 average against 1970–1989.
London's hottest November day on record is a recent one: 18°C (64°F) on November 24, 2024.
December 2024 was the 3rd warmest December in 48 years of records, 2.1°C (3.8°F) above the long-run average.
Source: NOAA GHCN-Daily, Hampstead (1971–2016); Heathrow (1986–2025). Records through 2025.