December weather forecast
Yokohama, Japan

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Weather in December

December in Yokohama greets the arrival of winter with cooler temperatures and declining humidity levels. It marks a significant difference in temperatures between day and night, signaling the onset of chillier days ahead. Rainfall, while still present, diminishes significantly in comparison to the previous months. This benefit is slightly offset by sporadic snowfall, a rare but cherished event in the city. Despite the shorter daylight hours, the festive atmosphere in Yokohama accompanied by clear visibility makes wandering through the city a joyous experience.

Temperature

The average high-temperature drops in December, from November's enjoyable 16.7°C (62.1°F) to a fresh 11.7°C (53.1°F). The nights of December cool down to an average low of 6.9°C (44.4°F), subtly lower than daytime highs.

Humidity

The average relative humidity in December in Yokohama is 63%.

Rainfall

December is the month with the least rainfall in Yokohama. Rain falls for 9 days and accumulates 40mm (1.57") of precipitation.

Snowfall

April through December are months without snowfall in Yokohama.

Sea temperature

In December, the average sea temperature is 18.9°C (66°F).
Note: Swimming in 18.9°C (66°F) is not an enjoyable experience for most. Breathing becomes progressively more challenging as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

The month with the shortest days in Yokohama is December, with an average of 9h and 48min of daylight.
On the first day of the month, sunrise is at 06:32 and sunset at 16:28. On the last day of December, in Yokohama, Japan, sunrise is at 06:50 and sunset at 16:38 JST.

Sunshine

In Yokohama, the average sunshine in December is 6.2h.

UV index

The months with the lowest UV index are January through March and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: In December, an average UV index of 3 transforms into the following instructions:
Ensure safety - Sun damage prevention is strongly urged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.

Frequently asked questions

What is the average December temperature in Yokohama?

In December, the average high-temperature and low-temperature in Yokohama, Japan, are 11.7°C (53.1°F) and 6.9°C (44.4°F) respectively. The average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, in August is calculated to be 36°C (96.8°F).

What is the average humidity in December in Yokohama?

In Yokohama, the average relative humidity in December is 63%.

What is the driest month in Yokohama?

The month with the least rainfall in Yokohama is December, when the rain falls for 9 days and typically collects 40mm (1.57") of precipitation.

How much does it rain in Yokohama in December?

In Yokohama, Japan, in December, it is raining for 9 days, with typically 40mm (1.57") of accumulated precipitation.

When it does not snow in Yokohama?

In Yokohama, Japan, snow does not fall in April through December.

Does it snow in Yokohama in December?

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

What is the sea temperature in December in Yokohama?

In Yokohama, Japan, in December, the average water temperature is 18.9°C (66°F). For swimming, a surface water temperature of 18.9°C (66°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).

What is the month with the shortest days in Yokohama?

The month with the shortest days in Yokohama, Japan, is December, with an average of 9h and 48min of daylight.

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

In December, the average day length in Yokohama, Japan, is 9h and 49min.

When is the sunrise / sunset in December in Yokohama?

In December, on the first day of the month, sunrise is at 06:32 and sunset at 16:28. On the last day of the month, in Yokohama, Japan, sunrise is at 06:50 and sunset at 16:38 JST.

How many hours of sunshine does Yokohama have in December?

The average sunshine duration in December in Yokohama is 6.2h.

When is the lowest UV index in Yokohama?

The months with the lowest UV index are January through March and December, with an average maximum UV index of 3.

What is the UV index reading in December in Yokohama?

In Yokohama, Japan, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in December
Yokohama, Japan

Average temperature in December - Yokohama, Japan
  • Average high temperature in December: 11.7°C

The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (9.3°C).

  • Average low temperature in December: 6.9°C

The month with the highest average low temperature is August (25.3°C).
The coldest month (with the lowest average low temperature) is January (4°C).

Average pressure in December
Yokohama, Japan

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

The month with the highest atmospheric pressure is November (1018mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).

Average wind speed in December
Yokohama, Japan

Average wind speed in December - Yokohama, Japan
  • Average wind speed in December: 15.6km/h

The windiest month (with the highest average wind speed) is April (17.9km/h).
The calmest month (with the lowest average wind speed) is June (14.2km/h).

Average humidity in December
Yokohama, Japan

Average humidity in December - Yokohama, Japan
  • Average humidity in December: 63%

The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is January (60%).

Average rainfall in December
Yokohama, Japan

Average rainfall in December - Yokohama, Japan
  • Average rainfall in December: 40mm

The wettest month (with the highest rainfall) is October (126mm).
The driest month (with the least rainfall) is December (40mm).

Average rainfall days in December
Yokohama, Japan

Average rainfall days in December - Yokohama, Japan
  • Average rainfall days in December: 9 days

The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in December
Yokohama, Japan

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

The month with the highest snowfall is February (22mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).

Average snowfall days in December
Yokohama, Japan

Average snowfall days in December - Yokohama, Japan
  • Average snowfall days in December: 0.2 days

The month with the highest number of snowfall days is February (1.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average sea temperature in December
Yokohama, Japan

Average sea temperature in December - Yokohama, Japan
  • Average sea temperature in December: 18.9°C

The best month for swimming (with the highest average sea temperature) is August (26.2°C).
The coldest months (with the lowest average sea temperature) are February and March (16.2°C).

Average daylight in December /
Average sunshine in December
Yokohama, Japan

Average daylight in December / Average sunshine in December - Yokohama, Japan
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in December: 6h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).

Average sunshine days in December
Yokohama, Japan

Average sunshine days in December - Yokohama, Japan
  • Average sunshine days in December: 19.7 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is October (11.7 days).

Average UV index in December
Yokohama, Japan

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

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

Average cloud cover in December
Yokohama, Japan

Average cloud cover in December - Yokohama, Japan
  • Average cloud cover in December: 31

The month with the most cloud cover is October (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 30).

Average visibility in December
Yokohama, Japan

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

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

Yokohama, Japan

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