Plymouth
Along with the rest of South West England, Plymouth has a temperate oceanic climate (Koppen Cfb) which is generally wetter and milder than the rest of England. This means a wide range of exotic plants can be grown. The annual mean temperature is approximately 11 degC (52 degF). Due to the modifying effect of the sea the seasonal range is less than in most other parts of the UK. As a result of this summer highs are lower than its southerly latitude should warrant, but as a contrast the coldest month of February has mean minimum temperatures as mild as between 3 and 4 degC (37 and 39 degF). Snow is rare, not usually equating to more than a few flakes, but there have been exclusions, namely the European winter storms of 2009-10 which, in early January, covered Plymouth in at least 1 inch (2.5 cm) of snow; more on higher ground. Another period of notable snow occurred from 17-19 December 2010 when up to 8 inches (20 cm) of snow fell through the period - though only 2 inches (5.1 cm) would lie at any one time due to melt. Over the 1961-1990 period, annual snowfall accumulation averaged less than 7 cm (3 in) per year. July and August are the warmest months with mean daily maxima over 19 degC (66 degF).
Up to how many centimeters of snow fell on Plymouth between 17 and 19 December 2010?
20
Snow is rare, not usually equating to more than a few flakes, but there have been exclusions, namely the European winter storms of 2009-10 which, in early January, covered Plymouth in at least 1 inch (2.5 cm) of snow; more on higher ground.
Plymouth