Climate of Japan — Month by Month
Country-wide average for Japan. Part of Eastern Asia, Asia.
Located in Eastern Asia, Asia, Japan has a seasonal climate. Country-wide average temperatures range from 5.4°C / 41.7°F in January to 26.4°C / 79.5°F in August, with annual rainfall totalling around 1537.3 mm / 60.5 in — driest in January (52.3 mm / 2.1 in), wettest in September (209.9 mm / 8.3 in). These are national averages; regional variation can be substantial, especially in geographically diverse countries. For city-level detail see the cities section below, and for state or province breakdowns follow the subdivisions link if available.
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| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | 5.4°C41.7°F | 52.3 mm2.1″ | — |
| February | 5.8°C42.4°F | 56.1 mm2.2″ | — |
| March | 8.6°C47.5°F | 117.5 mm4.6″ | — |
| April | 13.9°C57°F | 124.5 mm4.9″ | — |
| May | 18.2°C64.8°F | 137.8 mm5.4″ | — |
| June | 21.4°C70.5°F | 167.7 mm6.6″ | — |
| July | 25°C77°F | 153.5 mm6″ | — |
| August | 26.4°C79.5°F | 168.2 mm6.6″ | — |
| September | 23.1°C73.6°F | 209.9 mm8.3″ | — |
| October | 18.1°C64.6°F | 197.8 mm7.8″ | — |
| November | 12.5°C54.5°F | 92.5 mm3.6″ | — |
| December | 7.7°C45.9°F | 59.5 mm2.3″ | — |
Frequently asked questions
What is the best time to visit Japan?
Japan does not have a clear sunny-and-dry window by our cutoffs. The warmest month is August at 26.4°C / 79.5°F, and the driest is January at 52.3 mm / 2.1 in — likely your best travel window.
What is the climate of Japan?
Japan has country-wide monthly average temperatures ranging from 5.4°C / 41.7°F in January to 26.4°C / 79.5°F in August. Annual rainfall averages about 1537 mm / 60.5 in, with the wettest month being September (209.9 mm / 8.3 in) and the driest January (52.3 mm / 2.1 in). Regional variation within Japan can be significant — see subdivision or city pages for detail.
What is the hottest month in Japan?
The hottest month in Japan is August, with a country-wide average temperature of 26.4°C / 79.5°F.
What is the coldest month in Japan?
The coldest month in Japan is January, with a country-wide average temperature of 5.4°C / 41.7°F.
When does it rain most in Japan?
The wettest month in Japan is September, averaging about 209.9 mm / 8.3 in of rain. The driest is January with about 52.3 mm / 2.1 in.