Winter normally arrives in late November, and lasts until the middle of March when spring arrives. Summer usually arrives in the middle of May, and lasts until late September when autumn arrives. Precipitation is most common between June and November, in all these months it falls 50 mm (2.0 in) or more on average. August receives most precipitation with 74 mm (2.9 in). Between January and May precipitation levels fall a bit, with all months receiving less than 40 mm (1.6 in) on average. Annual precipitation is 576 mm (22.6 in). Rainfall can occur all year round, although it is less common in January and February. Snowfall mainly occurs between November and March. Snowfall in October and April can happen from time to time, but not every year. During the night between 30 April and 1 May 2014 it fell approximately 15 cm (5.9 in) of snow in Uppsala, the first recorded snowfall in May since 1981.