Yellow thunderstorm warning
Information on update: Warning extending further NW and to cover all of Wales while removing from parts of the east of England. Matrix position changed to Low likelihood of Medium impacts. A broad band of thunderstorms and heavy rain will move north across England and Wales, perh…
Tomorrow in London looks
light rain shower, with a high of 73°
and an overnight low of 64°.
There is a 86% chance of rain - plan accordingly.
Winds top out near 9 mph,
and the UV index reaches 4 (moderate).
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
Monthly averages for London based on 2015–2024 weather data.
January, with highs of 46°F (8°C) and lows near 35°F (2°C). The coldest day in the 2015-2024 record fell to 13°F (-10°C).
What is the 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 sit near 67°F (20°C), with rain on about 11 days a month. For the same question asked the other way round, see where else is warm in May.
How cold does London get in winter?
January nights average 35°F (2°C). Chilly rather than harsh - hard freezes are uncommon.
What should I wear in London?
It depends on the month: July runs to 73°F (23°C) while January holds at 46°F (8°C). The full month-by-month breakdown is in the packing notes above.
When is London at its hottest?
July, averaging 73°F (23°C) by day and 57°F (14°C) overnight. The hottest single day in our 2015-2024 record for this location reached 100°F (38°C).
Which month is wettest in London?
October, at 3.0 inches (77 mm) over about 12 days. April is the driest month, at 1.6 inches (40 mm).
How humid does London get?
Relative humidity averages 79% across the year, which reads as very humid. The most comfortable stretch falls in the drier half of the year.
Is there snow in London?
Yes - about 2 days a year carry measurable snowfall, concentrated January.