WeatherArchive / Climate averages / London
London climate: average weather by month
London averages 52°F (11°C) over the year. July is warmest, with highs around 71°F (22°C); January is coldest, with lows near 36°F (2°C). About 26 inches (671 mm) of precipitation falls on roughly 128 days a year, from 30 years of ERA5 data (1996–2025).
| Month | Avg high | Avg low | Precip. | Days ≥1 mm | Sunshine / day |
|---|---|---|---|---|---|
| January | 7.3°C | 2.1°C | 56.8 mm | 11.3 | 3.9 h |
| February | 8.3°C | 2.3°C | 49.8 mm | 10.3 | 5.2 h |
| March | 10.6°C | 3.4°C | 45.0 mm | 10.4 | 7.0 h |
| April | 13.7°C | 5.1°C | 46.0 mm | 10.4 | 9.6 h |
| May | 16.9°C | 8.4°C | 54.8 mm | 10.7 | 10.4 h |
| June | 20.1°C | 11.6°C | 58.0 mm | 10.3 | 11.1 h |
| July | 21.9°C | 13.6°C | 58.4 mm | 10.7 | 11.2 h |
| August | 21.6°C | 13.6°C | 60.6 mm | 10.2 | 9.9 h |
| September | 19.1°C | 11.5°C | 49.1 mm | 9.0 | 8.2 h |
| October | 15.1°C | 8.8°C | 66.6 mm | 12.1 | 6.0 h |
| November | 10.6°C | 5.0°C | 66.8 mm | 11.4 | 4.5 h |
| December | 8.0°C | 3.1°C | 59.1 mm | 11.2 | 3.6 h |
Record high 1996–2025: 37.9°C on 2022-07-19. Record low: -10.3°C on 2021-02-11.
Source: Open-Meteo Historical Weather API (CC BY 4.0). Values are ERA5 reanalysis model data on a ~9–25 km grid, not readings from a weather station, so a single town’s thermometer can differ by a few degrees and local showers can be missed. Grid cell 51.49, -0.16 at 16 m. For snowfall, humidity and a best-time-to-visit score, open London in the climate tool.