London, United Kingdom Weather
London hourly forecast: next 24 hours
Today's high of 74°F (23°C) is about 7°F (4°C) above the typical September high of 67°F (20°C).
Current conditions in detail
London weather tomorrow (Wednesday, September 16)
Tomorrow in London looks sunny, with a high of 64° and an overnight low of 55°. Rain is unlikely (8% chance). Winds top out near 10 mph, and the UV index reaches 3 (low).
London 14-day forecast
About the weather in London
London has an oceanic climate. Average highs run from 46°F (8°C) in January to 73°F (23°C) in July, and the city records roughly 135 days of measurable precipitation a year.
London weather: quick facts
- Hottest month: July - highs near 73°F (23°C)
- Coldest month: January - highs near 46°F (8°C)
- Decade extremes (2015-2024): 100°F (38°C) high · 13°F (-10°C) low
- Wettest month: October (12 rainy days) · Sunniest: June (11.2 h sun/day)
- Climate type: oceanic
- Annual swing: 14°C between the average warmest and coolest month · day to night: 7°C
- Snow: about 2 days a year
- Average humidity: 79%
Temperatures through the year
At its warmest, in July, London runs to 73°F (23°C) in the afternoon and back to 57°F (14°C) by dawn. January is the coolest month, with highs of 46°F (8°C) and lows near 35°F (2°C). Four of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is June through September.
Rain, sun and snow
Precipitation concentrates in October - 3.0 inches (77 mm) on 12 days - and thins out by April. Snowfall is rare but not unheard of. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 100°F (38°C) and the lowest daily minimum 13°F (-10°C).
Season by season
Spring (March through May)
Through spring, London is mild: 57°F (14°C) by day, 42°F (6°C) after dark, and rain falls on around 34 of the 90 days.
Summer (June through August)
Summer brings comfortable warmth here - highs near 71°F (22°C), nights near 56°F (13°C), and rain falls on around 31 of the 90 days. Daylight is generous - around 10.8 hours of sun a day.
Fall (September through November)
Fall in London stays on the cool side of mild, with daytime highs averaging 60°F (15°C) and nights around 47°F (9°C); rain falls on around 34 of the 90 days.
Winter (December through February)
Through winter, London is chilly: 48°F (9°C) by day, 37°F (3°C) after dark, and rain falls on around 35 of the 90 days.
Average temperatures in London by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 46° | 35° | 12 | 2.4 in | 4.3 h/day | 86% |
| February | 49° | 37° | 11 | 2.1 in | 5.2 h/day | 82% |
| March | 52° | 39° | 13 | 2.3 in | 6.5 h/day | 79% |
| April | 57° | 41° | 10 | 1.6 in | 9.5 h/day | 74% |
| May | 63° | 47° | 11 | 2.3 in | 10.6 h/day | 74% |
| June | 69° | 53° | 11 | 2.4 in | 11.2 h/day | 72% |
| July | 73° | 57° | 11 | 2.4 in | 11.2 h/day | 71% |
| August | 72° | 57° | 10 | 2.2 in | 10.0 h/day | 74% |
| September | 67° | 53° | 11 | 2.5 in | 8.4 h/day | 77% |
| October | 60° | 48° | 12 | 3.0 in | 6.3 h/day | 83% |
| November | 52° | 42° | 11 | 2.6 in | 4.4 h/day | 86% |
| December | 49° | 40° | 12 | 2.6 in | 3.3 h/day | 88% |