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
The first month of the winter, December, is still a cool month in Tokyo, Japan, with temperature in the range of an average high of 11.2°C (52.2°F) and an average low of 5.9°C (42.6°F).

Temperature

In Tokyo, Japan, the average high-temperature drops, from an enjoyable 16.5°C (61.7°F) in November, to a fresh 11.2°C (52.2°F). In Tokyo, the average low-temperature is 5.9°C (42.6°F).

Humidity

In Tokyo, Japan, the average relative humidity in December is 62%.

Rainfall

The month with the least rainfall is December when the rain falls for 8.8 days and typically collects 21mm (0.83") of precipitation.

Snowfall

April through December are months without snowfall in Tokyo.

Sea temperature

In December, the average sea temperature is 17.3°C (63.1°F).
Note: For swimming, a surface water temperature of 17.3°C (63.1°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

The month with the shortest days in Tokyo is December, with an average of 9.8h of daylight.

Sunshine

The average sunshine in December is 6.3h.

UV index

January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Tokyo?

In Tokyo, Japan, in December, the average high-temperature is 11.2°C (52.2°F), and the average low-temperature is 5.9°C (42.6°F).

What is the average humidity in December in Tokyo?

The average relative humidity in December is 62%.

How much does it rain in Tokyo in December?

In Tokyo, in December, during 8.8 rainfall days, 21mm (0.83") of precipitation is typically accumulated.

What is the driest month in Tokyo?

December is the month with the least rainfall in Tokyo. Rain falls for 8.8 days and accumulates 21mm (0.83") of precipitation.

Does it snow in Tokyo in December?

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

When it does not snow in Tokyo?

April through December are months without snowfall in Tokyo.

What is the sea water temperature in December in Tokyo?

In December, the average sea temperature in Tokyo, Japan, is 17.3°C (63.1°F). Swimming in 17.3°C (63.1°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the month with the shortest days in Tokyo?

The month with the shortest days in Tokyo, Japan, is December, with an average of 9.8h of daylight.

What is the average length of the day in December in Tokyo?

The average length of the day in December in Tokyo is 9.8h.

How many hours of sunshine does Tokyo have in December?

The average sunshine in December is 6.3h.

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

January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Tokyo, Japan.

What is the UV index intensity in December in Tokyo?

The average daily maximum UV index in December in Tokyo, Japan, is 3. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.
Average temperature in December - Tokyo, Japan
  • Average high temperature in December: 11.2°C

The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (8.9°C).

  • Average low temperature in December: 5.9°C

The month with the highest average low temperature is August (25.1°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).

Average pressure in December - Tokyo, Japan
  • Average pressure in December: 1016.3mbar

The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).

Average wind speed in December - Tokyo, Japan
  • Average wind speed in December: 12.9km/h

The windiest month (with the highest average wind speed) is April (15.3km/h).
The calmest month (with the lowest average wind speed) is November (12.1km/h).

Average humidity in December - Tokyo, Japan
  • Average humidity in December: 62%

The month with the highest relative humidity is July (77%).
The month with the lowest relative humidity is January (59%).

Average rainfall in December - Tokyo, Japan
  • Average rainfall in December: 21mm

The wettest month (with the highest rainfall) is October (51mm).
The driest month (with the least rainfall) is December (21mm).

Average rainfall days in December - Tokyo, Japan
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is January (7.3 days).

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

The month with the highest snowfall is February (21mm).
Months with the least 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: 0.1 days

The month with the highest number of snowfall days is February (2.3 days).
Months with the least snowfall days are April, 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 the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in December: 6.3h

The month with the most sunshine is August (Average sunshine: 10.3h).
The month with the least sunshine is February (Average sunshine: 5.8h).

Average sunshine days in December - Tokyo, Japan
  • Average sunshine days in December: 20.3 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is June (14.4 days).

Average UV index in December - Tokyo, Japan
  • Average UV index in December: 3

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, March, November and December (UV index 3).

Average cloud cover in December - Tokyo, Japan
  • Average cloud cover in December: 30

Months with the most cloud cover are June and October (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 28).

Average visibility in December - Tokyo, Japan
  • Average visibility in December: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).