December weather forecastOtsuki, Japan

December

Weather in December

The first month of the winter, December, is still a chilly month in Otsuki, Japan, with an average temperature ranging between max 7.2°C (45°F) and min -1.2°C (29.8°F).

Temperature

Otsuki's transition into December involves a shift in temperature, receding from a fresh 12.5°C (54.5°F) in November to a chilly 7.2°C (45°F). An average low-temperature of -1.2°C (29.8°F) marks the nights throughout December.

Humidity

The average relative humidity in December in Otsuki, Japan, is 74%.

Rainfall

In Otsuki, in December, during 10.7 rainfall days, 67mm (2.64") of precipitation is typically accumulated. Throughout the year, there are 209 rainfall days, and 1496mm (58.9") of precipitation is accumulated.

Snowfall

Months with snowfall in Otsuki are January through April, November and December. In Otsuki, during December, snow falls for 7.8 days and regularly aggregates up to 130mm (5.12") of snow. Throughout the year, in Otsuki, there are 46.7 snowfall days, and 1035mm (40.75") of snow is accumulated.

Daylight

With an average of 9h and 48min of daylight, December has the shortest days of the year in Otsuki, Japan.
On the first day of the month, sunrise is at 06:35 and sunset at 16:31. On the last day of December, sunrise is at 06:53 and sunset at 16:41 JST.

Sunshine

In December, the average sunshine in Otsuki is 6.4h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Frequently asked questions

In December, the average high-temperature and low-temperature are 7.2°C (45°F) and -1.2°C (29.8°F) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, is calculated to be 31°C (87.8°F).

In Otsuki, the average relative humidity in December is 74%.

In Otsuki, Japan, in December, it is raining for 10.7 days, with typically 67mm (2.64") of accumulated precipitation.

In Otsuki, Japan, in December, snow falls for 7.8 days, with typically accumulated 130mm (5.12") of snow.

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

The average day length in December in Otsuki is 9h and 48min.

On the first day of December in Otsuki, sunrise is at 06:35 and sunset at 16:31. On the last day of the month, sunrise is at 06:53 and sunset at 16:41 JST.

In December, the average sunshine duration in Otsuki, Japan, is 6.4h.

The months with the lowest UV index in Otsuki, Japan, are January through March, November and December, with an average maximum UV index of 2.

The average daily maximum UV index in December in Otsuki is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Otsuki, Japan

  • Average high temperature in December: 7.2°C

The warmest month (with the highest average high temperature) is August (27.3°C).
The month with the lowest average high temperature is January (4.6°C).

  • Average low temperature in December: -1.2°C

The month with the highest average low temperature is August (18.8°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).

Average pressure in December
Otsuki, Japan

  • Average pressure in December: 1017mbar

The month with the highest atmospheric pressure is November (1018.4mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).

Average wind speed in December
Otsuki, Japan

  • Average wind speed in December: 7.8km/h

The windiest months (with the highest average wind speed) are March and April (8.6km/h).
The calmest month (with the lowest average wind speed) is August (6.6km/h).

Average humidity in December
Otsuki, Japan

  • Average humidity in December: 74%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is January (70%).

Average rainfall in December
Otsuki, Japan

  • Average rainfall in December: 67mm

The wettest month (with the highest rainfall) is October (219mm).
The driest month (with the least rainfall) is January (54mm).

Average rainfall days in December
Otsuki, Japan

  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is August (25.3 days).
The month with the least rainy days is January (8.2 days).

Average snowfall in December
Otsuki, Japan

  • Average snowfall in December: 130mm

The month with the highest snowfall is March (284mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in December
Otsuki, Japan

  • Average snowfall days in December: 7.8 days

The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

  • Average daylight in December: 9h and 48min

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 24min

The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).

Average sunshine days in December
Otsuki, Japan

  • Average sunshine days in December: 14.8 days

The month with the most sunshine days is January (15.1 days).
The month with the least sunshine days is August (3.2 days).

Average UV index in December
Otsuki, Japan

  • Average UV index in December: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in December
Otsuki, Japan

  • Average cloud cover in December: 31

The month with the most cloud cover is June (Cloud cover 53).
The month with the least cloud cover is January (Cloud cover 28).

Average visibility in December
Otsuki, Japan

  • Average visibility in December: 9km

The months with the highest visibility are January, February, March, April, November and December (9km).
The months with the lowest visibility are May, June, July, August, September and October (8km).