Japan Data Archive

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What is the climate of Japan like?

The climate of most of Japan is characterized by four distinct seasons.
The spring months generally are from March to May, summer months are from June to August, autumn from September to November, and winter from December to February.
The difference between winter temperatures and summer temperatures is more than 30 degrees celsius. Summer months, with high temperatures and high humidity, may be uncomfortable for those who are used to a dry continental climate.
In spring and autumn, almost all parts of Japan enjoy comfortable temperatures, but the weather is verv changeable.
In the beginning of summer, all areas except Hokkaido have a rainy season, which usually lasts from early June to mid-July.
Autumn is also a time of substantial precipitation.
From the end of summer to the beginning of autumn, typhoons generated in the western part of the North Pacific Ocean hit the country, sometimes causing extensive damage.
Mountain ranges, running almost the full length of Japan, divide the archipelago into the Japan Sea side and the Pacific side.
The Japan Sea side has heavy snowfall in winter.