Climate

London has a temperate oceanic climate, similar to much of southern Britain. Despite its reputation as being a rainy city, London receives less precipitation in a year than Rome at 834 mm (32.8 in), or Bordeaux at 923 mm (36.3 in). Winters are generally chilly to cold with frost usually occurring in the suburbs on average twice a week from November to March. Snow usually occurs about 4 or 5 times a year mostly from December to February. Snowfall during March and April is rare but does occur every 2–3 years. Winter temperatures seldom fall below −4 °C (24.8 °F) or rise above 14 °C (57.2 °F). During the winter of 2010, London experienced its lowest temperature on record (−14 °C (6.8 °F)) in Northolt and the heaviest snow seen for almost two decades, a huge strain on London's transport infrastructure. Summers are generally warmand sometimes hot, the heat being boosted by the urban heat island effect making the centre of London at times 5 °C (9 °F) warmer than the suburbs and outskirts. London's summer average is 24 °C (75.2 °F). On average there are 7 days a year above 30 °C (86.0 °F) and 2 days a year above 32 °C (89.6 °F). Temperatures of 26 °C (80 °F) usually occur on a weekly basis from mid- June to late August. During the 2003 European heat wave there were 14 consecutive days above 30 °C (86.0 °F) and 2 consecutive days where temperatures soared up to 38 °C (100.4 °F), leading to hundreds of heat related deaths. Rain generally occurs on around 2 out of 10 summer days. Spring and Autumn are mixed seasons and can be pleasant. On 1 October 2011, the air temperature attained 30 °C (86.0 °F) and in April 2011 it reached 28 °C (82.4 °F). However in recent years both of these months have also had snowfall. Temperature extremes range from −10 °C (14.0 °F) to 37.9 °C (100.2 °F).