The climate of Riga is humid continental (Köppen ''Dfb''). The coldest months are January and February, when the average temperature is  but temperatures as low as  can be observed almost every year on the coldest days. The proximity of the sea causes frequent autumn rains and fogs. Continuous snow cover may last eighty days. The summers in Riga are mild and rainy with an average temperature of , while the temperature on the hottest days can exceed .