Tel Aviv has a Mediterranean climate (Köppen climate classification: Csa), with hot, humid summers, unpredictably cool to warm springs and autumns, and typically cool, rainy winters. Humidity tends to be high year-round due to the city's proximity to the sea. In winter, average temperatures are usually between 9 °C (48 °F) and 17 °C (63 °F), with temperatures as low as 6 °C (43 °F) occurring several times a winter. In summer, the average is 26 °C (79 °F), with daytime temperatures sometimes exceeding 32 °C (90 °F). Despite the high humidity, precipitation during summertime is rare. Tel Aviv averages 530.7 millimeters (20.9 in) of precipitation annually which mostly occur from October through April. Winter is the wettest season, with cold fronts occurring often. Snow is extremely rare, with the last snowfall occurring in February 1950. Tel Aviv enjoys long daytime hours with more than 300 sunny days a year.