December weather forecast and climate
Tokyo, Japan

A stunning view of the cityscape of Tokyo, Japan, taken at dusk
A stunning view of the cityscape of Tokyo, Japan, taken at dusk
Winter sets in December bringing the temperatures in Tokyo to low averages between 4°C (39.2°F) and 11°C (51.8°F). These can go lower, especially on the extremely windy days and nights. Most activities are based on weather retreat indoors.
December remains one of the driest months with a low precipitation of 43.2mm (1.7") fetched from only nine rainy days. Outdoors can be cold, but at least the weather stays dry and sunny with up to six hours of the sunshine per day.
The ocean gets colder with a low temperature of 19°C (66.2°F). As much as swimming can still go on, it is reserved for the brave and lovers of the cold waters.

What is the temperature in December in Tokyo?

The average high-temperature, in December, is 11.9°C (53.4°F), while the average low-temperature is 3.5°C (38.3°F).

What is the average humidity in December in Tokyo?

In Tokyo, Japan, the average relative humidity in December is 56%.

How many days does it rain in December in Tokyo?

In Tokyo, Japan, in December, it is raining for 11.8 days, with typically 108.7mm (4.3") of accumulated precipitation.

Does it snow in Tokyo in December?

In Tokyo, in December, it doesn't snow. In January, it regularly snows.

What is the sea temperature in December in Tokyo?

In Tokyo, Japan, in December, the average water temperature is 17.3°C (63.1°F). For most, swimming in 17.3°C (63.1°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

What is the month with the lowest UV index in Tokyo?

January and December, with an average UV index of 2, are months with the lowest UV index in Tokyo.

What is the average UV index in December in Tokyo?

The average UV index in December is 2.
Average temperature in December - Tokyo, Japan
  • Average high temperature in December: 11.9°C

The warmest month (with the highest average high temperature) is August (30.8°C).
The month with the lowest average high temperature is January (9.6°C).

  • Average low temperature in December: 3.5°C

The month with the highest average low temperature is August (23°C).
The coldest month (with the lowest average low temperature) is January (0.9°C).

Average humidity in December - Tokyo, Japan
  • Average humidity in December: 56%

The month with the highest relative humidity is July (77%).
The month with the lowest relative humidity is January (52%).

Average rainfall in December - Tokyo, Japan
  • Average rainfall in December: 108.7mm

The wettest month (with the highest rainfall) is May (145.4mm).
The driest month (with the lowest rainfall) is February (58.2mm).

Average rainfall days in December - Tokyo, Japan
  • Average rainfall days in December: 11.8 days

The month with the highest number of rainy days is October (13 days).
The month with the lowest number of rainy days is July (8.4 days).

Average snowfall in December - Tokyo, Japan
  • Average snowfall in December: 0mm

Months with the highest snowfall are January and February (50mm).
Months with the lowest snowfall are April, May, June, July, August, September, October, November and December (0mm).

Average snowfall days in December - Tokyo, Japan
  • Average snowfall days in December: 0.8 days

The month with the highest number of snowfall days is February (3.7 days).
Months with the lowest number of snowfall days are May, June, July, August, September, October and November (0 days).

Average sea temperature in December - Tokyo, Japan
  • Average sea temperature in December: 17.3°C

The best month for swimming (with the highest average sea temperature) is August (25.7°C).
The coldest month (with the lowest average sea temperature) is February (14°C).

Average daylight in December / Average sunshine in December - Tokyo, Japan
  • Average daylight in December: 9.8h

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.8h).

  • Average sunshine in December: 5.7h

The month with most sunshine is January (Average sunshine: 6h).
The month with least sunshine is September (Average sunshine: 4h).

Average UV index in December - Tokyo, Japan
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 2).

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