WeatherArchive / Climate averages / London
London weather by month: climate averages
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.
London weather month by month
The wettest month in London is November, averaging 2.6 in (67 mm); the driest is March at 1.8 in (45 mm). October has the most days with at least 1 mm of rain (about 12). July is the sunniest month, with about 11.2 hours of sunshine a day, against 3.6 hours in December. If you like average highs between 64 °F and 82 °F (18–28 °C) with few rainy days, aim for June, August and September.
Planning a particular day? See how often that date was wet or hot over 30 years with the event weather odds, or look up what the weather actually was on any past date in the historical weather archive.
Questions people ask
What is the warmest month in London?
July, with an average daily high of 71°F (22°C) over 1996–2025.
What is the coldest month in London?
January, when nights average about 36°F (2°C).
What is the rainiest month in London?
November has the most precipitation (about 2.6 in (67 mm)), and October has the most rainy days (about 12 days with 1 mm or more). The driest month is March.
How much sunshine does London get?
About 7.5 hours of bright sunshine a day averaged over the year, from 3.6 h in December to 11.2 h in July. Sunshine here is the model’s estimate of hours with direct sun, not hours of daylight.
What is the best month to visit London for mild weather?
By average high between 64 °F and 82 °F (18–28 °C) and the fewest rainy days: June, August, September. Prices, crowds and events are not included.