southern-england_-climate-met-office.pdf
January 1979 and -18.2 °C at Lacock, Wiltshire on 13 December 1981. On the latter date, -11.8 °C was recorded at Heathrow (Greater London), whilst at St James's Park (Central London) the temperature fell no lower than -7.0 °C. July is the warmest month, with mean daily maximum temperatures in the London