Cold overnight minimums in Summer. From a large selection of Met Office and Amateur weather stations during June,July and August with some cold temperatures in early September. Based on temperaures in Scotland and N. Ireland 0c or below in June, July, August and the rest of the UK 5c or below especially in the southern half of England and the whole of Wales. Credits - Met Office, The International Journal of Meteorology, Tutiempo and KNMI Climate Explorer