Manchester experiences a temperate oceanic climate (Köppen: Cfb), like much of the British Isles, with warm summers and cool winters. Summer daytime temperatures regularly top 20 Celsius, quite often reaching 25 Celsius on sunny days during July and August in particular. In more recent years, temperatures have occasionally reached over 30 Celsius. There is regular but generally light precipitation throughout the year. The city's average annual rainfall is compared to a UK average of , and its mean rain days are 140.4 per annum, compared to the UK average of 154.4. Manchester has a relatively high humidity level, and this, along with abundant soft water, was one factor that led to advancement of the textile industry in the area. Snowfalls are not common in the city because of the urban warming effect but the West Pennine Moors to the north-west, South Pennines to the north-east and Peak District to the east receive more snow, which can close roads leading out of the city. They include the A62 via Oldham and Standedge, the A57, Snake Pass, towards Sheffield, and the Pennine section of the M62. The lowest temperature ever recorded in Manchester was on 7 January 2010.