Japan weather

Our guide to the weather in Japan during December

3

Average high

1

UV Index

112mm

Monthly rainfall

75%

Humidity

We've looked at the most up-to-date weather data for Japan, covering the last 12 years up to 2026, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Japan weather in December.

How cold is it in Japan during December?

It's cold in Japan during December. The temperature tops out at around 3℃ during the day, falling away to -4℃ at night. Brrrr! The UV index will be low at this time of year, so not something to worry about. However, if you're going to be outside for long periods it's always a good idea to apply a small amount of sunscreen to exposed skin.

Does it snow in Japan during December?

Yes, it's very likely that it'll snow, and there will also be ice and snow on the ground, so pack appropriate footwear and clothing.

Does it rain in Japan during December?

On average, there will be 10 rainy days during the month, amounting to 112.2mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. Of course, some of that rain will actually fall as sleet, snow, and possibly freezing rain. You're not likely to see a thunderstorm during your trip.

Is it windy in Japan during December?

You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in December. With cold air temperatures at this time of year, any breeze will feel very cold.

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Weather in Japan

Our month-by-month guide to the weather and climate in Japan

-0.3

Japan weather in

January
1.6

Japan weather in

February
7.0

Japan weather in

March
13.1

Japan weather in

April
19.5

Japan weather in

May
23.2

Japan weather in

June
26.8

Japan weather in

July
28.2

Japan weather in

August
23.3

Japan weather in

September
16.4

Japan weather in

October
10.0

Japan weather in

November
3.1

Japan weather in

December