London, United Kingdom Climate & Monthly Averages
The climate of London
Weather in London is shaped by its oceanic climate - expect mild temperatures year-round with regular rainfall. July afternoons typically reach 73°F (23°C), while January highs hover near 46°F (8°C). Annual precipitation averages 28.4 inches (721 mm) over about 135 rainy days.
Climate quick facts
- Hottest month: July - highs near 73°F (23°C)
- Coldest month: January - highs near 46°F (8°C)
- Record high: 100°F (38°C) · Record low: 13°F (-10°C) (2015–2024)
- Wettest month: October (12 rainy days) · Sunniest: June (11.2 h sun/day)
- Climate type: oceanic - mild temperatures year-round with regular rainfall
- Snow: about 2 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 73°F (23°C) and overnight lows stay near 57°F (14°C). The coolest month is January, with typical highs of 46°F (8°C) and lows around 35°F (2°C). Based on 2015–2024 weather data, temperatures have reached as high as 100°F (38°C) and dropped as low as 13°F (-10°C).
Rain, sun and snow
October is usually the wettest month. It brings about 3.0 inches (77 mm) of rain over 12 days, while April is the driest. June brings the most sunshine, averaging 11.2 hours of sun a day. Snowfall is rare but not unheard of.
Monthly climate table
| 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% |
London month by month
London weather in January
January brings highs around 46°F (8°C), lows near 35°F (2°C), about 12 wet days - typically the coldest month of the year in London.
London weather in February
February brings highs around 49°F (9°C), lows near 37°F (3°C), about 11 wet days.
London weather in March
March brings highs around 52°F (11°C), lows near 39°F (4°C), about 13 wet days.
London weather in April
April brings highs around 57°F (14°C), lows near 41°F (5°C), about 10 wet days - typically the driest month of the year in London.
London weather in May
May brings highs around 63°F (17°C), lows near 47°F (8°C), about 11 wet days.
London weather in June
June brings highs around 69°F (21°C), lows near 53°F (12°C), about 11 wet days - typically the sunniest month of the year in London.
London weather in July
July brings highs around 73°F (23°C), lows near 57°F (14°C), about 11 wet days - typically the hottest month of the year in London.
London weather in August
August brings highs around 72°F (22°C), lows near 57°F (14°C), about 10 wet days.
London weather in September
September brings highs around 67°F (20°C), lows near 53°F (12°C), about 11 wet days.
London weather in October
October brings highs around 60°F (16°C), lows near 48°F (9°C), about 12 wet days - typically the wettest month of the year in London.
London weather in November
November brings highs around 52°F (11°C), lows near 42°F (5°C), about 11 wet days.
London weather in December
December brings highs around 49°F (9°C), lows near 40°F (4°C), about 12 wet days.
Seasons in London
Spring (March through May)
Spring in London stays on the cool side of mild, with daytime highs averaging 57°F (14°C) and nights around 42°F (6°C); expect showers on roughly 34 days across the season.
Summer (June through August)
Summer in London is pleasantly warm, with daytime highs averaging 71°F (22°C) and nights around 56°F (13°C); expect showers on roughly 31 days across the season.
Fall (September through November)
Fall in London is crisp but comfortable, with daytime highs averaging 60°F (15°C) and nights around 47°F (9°C); expect showers on roughly 34 days across the season.
Winter (December through February)
Winter in London is brisk and cold, with daytime highs averaging 48°F (9°C) and nights around 37°F (3°C); expect showers on roughly 35 days across the season.
Climate questions, answered
What is the average temperature in London?
Is London hot in summer?
Is London cold in winter?
How many rainy days does London get in a year?
Best time to visit London
The best time to visit London is generally May to October, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 67°F (20°C).
Pack for London with a warm jacket and layers for the cooler season; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - July nights average 57°F (14°C).
London temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.