Because of the warming influence of the Gulf Stream and the prevailing wind patterns, Finland's climate is comparatively mild for the high latitude. During the winter, the average temperature ranges from -14°c to -3°c (7–27°f), while summer mean temperatures range from 13–18°c (55–65°f). Snow cover lasts from about 90 days in the Åland Islands to 250 days in Enontekiö. Average annual precipitation (including both rain and snow) ranges from 40 cm (16 in) in northern Finland to 71 cm (28 in) in southern Finland.