Our weather and climate analysis offers a detailed understanding of average weather patterns for locations across the globe. Derived from 26 years of historical simulated weather data from ECMWF, it provides valuable insights into typical weather conditions, including air temperature, humidity, precipitation, cloud cover and wind. It is important to note the data is not observational, but rather derived from climate reanalysis.
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United Kingdom > London > Overview
Discover if upcoming months are expected to be warmer, colder, wetter, or drier than average
What is the best time to visit London to enjoy the optimal weather conditions?
This quick reference weather table contains a summary of the annual climate trends in London. It contains key metrics, including average monthly high & low temperatures, rainfall, humidity and UV index. The data is presented on a monthly basis, allowing you to see how each these weather components change throughout the year.
London's long-term climate patterns earn these Weather Badges.
Explore the most extreme weather events in London over the past 26 years, including record highs and lows for temperatures, rainfall, and wind speeds. This data is sourced from the latest ERA5 reanalysis model spanning 2000 to 2025.
Explore weather patterns in areas close to London, United Kingdom
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Use our Climate Finder to search locations by their temperature and humidity patterns.
Weather guides, climate insights, and travel planning stories that talk about London.
London experiences a temperate maritime climate defined by moderate seasonal variations rather than extreme shifts. The city generally avoids bitterly cold winters and scorching summers. Across the year, the average temperature range varies by 12.7°C (22.9°F). During the warmer months, the daily mean temperature settles at pleasant levels around 17.0°C (62.6°F), while the winter season sees averages drop to a crisp and cool 5.5°C (41.9°F).
Cloud cover and precipitation are persistent features of the local weather pattern. Skies remain frequently gray and overcast, with significant cloud coverage occurring 85.1 of the time during the cloudiest month. Rainfall remains relatively consistent year-round, accumulating a total of 727 mm (29 in), though October brings the heaviest precipitation with averages reaching 71 mm (3 in). Winds typically blow from the SW, with the highest average speeds of 16.6 km/h (10.3 mph) occurring in late winter.
WeatherBox data shows that intense heat is rare, as temperatures seldom rise above 26.7°C (80.1°F). Even during the height of summer, when sunshine peaks at 248.2, the average peak UV Index is 4.7. Conversely, hard freezes are infrequent, with temperatures rarely falling below -2.0°C (28.4°F). While humidity peaks in winter, the air feels most comfortable 65.6 of the time during July. Review the advanced charts on WeatherBox for a deeper analysis of these weather patterns.
