London, the capital of England and largest city in the United Kingdom, has a temperate oceanic climate, with warm summers and cool winters. While the city annually has modest precipitation, there are long periods of overcast skies and frequent light mist-type precipitation, which may account for the rainy image of the city.
The myth of a rainy London. Yet, even so, it doesn't rain that much in London. ... In the rest of the country, according to the UK Met Office, the average rainfall in Britain is 1,154mm per year. On average it rains for 156.2 days per year (data from 1981 to 2010).