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In the spring, southern and western Japan can be quite warm and sunny, from 59 to 77 degrees. Northern Japan ranges from 50 to 68 degrees. Snow remains on the hills into April or May in northern areas. And like Spring in much of the U.S., weather can range significantly from mild, to warm, to cold, on a daily basis.
Home > Weather, Climate & Earthquake Information > Climate of Japan > General Information on Climate of Japan. Japan has four distinct seasons with a climate ranging from subarctic in the north to subtropical in the south. Conditions are different between the Pacific side and the Sea of Japan side. Northern Japan has warm summers and very cold winters with heavy snow on the Sea of Japan side and in mountainous areas.