Weather in Japan in December

December in Japan is deep winter. Days are short. The outdoor plan is a window in the middle of the day or not at all.

A country pin in December is a warning: one region of Japan will not match another. Use a city page if you already know where you are going. Compared with August and January, December sits in the middle of Japan's year.

Japan
Average temp
3°C

-2–8°C

Rainfall
32 mm

Not much rain

Sunshine
5.1 h

hours per day

What to expect

Daytime

Days in Japan in December are about getting between indoor places. The cold is the story. Gloves are not a fashion choice.

A clear spell is for a short walk, then back in. Do not plan a long outdoor day as the default. Night falls early and the cold deepens with it.

Rain

December is on the drier side of the year in Japan. Showers are possible. They do not define the month.

A shell that lives in the bag is enough. This is not September, and it should not be packed as if it were.

Evening

Evenings are cooler. A layer helps after sunset.

What to pack

  • A layer for cooler evenings

Average weather in Japan

TemperatureRainfall

Source: MeteostatPeriod: 1991-2020Checked: 28 Aug 2026265 places covered

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FAQs about Japan

Climate averages for Japan, 1991–2020.

The best time to visit Japan is between May and October, the most comfortable stretch of the year on these averages.

August is the hottest month, with an average around 26°C.

September is the wettest month, with about 156 mm of rain.

No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.