December weather forecastNumata, Japan

December

Weather in December

The first month of the winter, December, is still a cold month in Numata, Japan, with an average temperature fluctuating between 4.1°C (39.4°F) and -2.3°C (27.9°F).

Temperature

The average high-temperature drops in December, from November's cool 10.4°C (50.7°F) to a cold 4.1°C (39.4°F). During December, the nighttime temperature averages of -2.3°C (27.9°F).

Humidity

The average relative humidity in December in Numata, Japan, is 77%.

Rainfall

In Numata, in December, it is raining for 11.9 days, with typically 49mm (1.93") of accumulated precipitation. In Numata, during the entire year, the rain falls for 190.1 days and collects up to 941mm (37.05") of precipitation.

Snowfall

January through April, November and December are months with snowfall in Numata. In Numata, Japan, in December, snow falls for 14.4 days, with typically accumulated 207mm (8.15") of snow. Throughout the year, in Numata, Japan, there are 67.2 snowfall days, and 1024mm (40.31") of snow is accumulated.

Daylight

December has the shortest days of the year in Numata, with an average of 9h and 42min of daylight.
On the first day of the month, sunrise is at 06:37 and sunset at 16:28. On the last day of December, in Numata, sunrise is at 06:55 and sunset at 16:37 JST.

Sunshine

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

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.

Frequently asked questions

December temperatures in Numata vary between a high-temperature of 4.1°C (39.4°F) and a low-temperature of -2.3°C (27.9°F). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 30°C (86°F).

The average relative humidity in December in Numata is 77%.

In Numata, in December, it is raining for 11.9 days, with typically 49mm (1.93") of accumulated precipitation.

In Numata, in December, snow falls for 14.4 days, with typically accumulated 207mm (8.15") of snow.

With an average of 9h and 42min of daylight, December has the shortest days of the year in Numata.

In Numata, Japan, the average day length in December is 9h and 43min.

In December, on the first day of the month, sunrise is at 06:37 and sunset at 16:28. On the last day of the month, in Numata, sunrise is at 06:55 and sunset at 16:37 JST.

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

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

The average daily maximum UV index in December in Numata, Japan, is 2. A UV Index value of 2, and less, symbolizes a low health threat 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
Numata, Japan

  • Average high temperature in December: 4.1°C

The warmest month (with the highest average high temperature) is August (27.1°C).
The month with the lowest average high temperature is January (1.1°C).

  • Average low temperature in December: -2.3°C

The month with the highest average low temperature is August (18.4°C).
The coldest month (with the lowest average low temperature) is January (-5.8°C).

Average pressure in December
Numata, Japan

  • Average pressure in December: 1017.1mbar

The month with the highest atmospheric pressure is November (1018.9mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).

Average wind speed in December
Numata, Japan

  • Average wind speed in December: 9.9km/h

The windiest month (with the highest average wind speed) is January (10.8km/h).
The calmest month (with the lowest average wind speed) is July (5.2km/h).

Average humidity in December
Numata, Japan

  • Average humidity in December: 77%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is May (73%).

Average rainfall in December
Numata, Japan

  • Average rainfall in December: 49mm

The wettest month (with the highest rainfall) is July (153mm).
The driest month (with the least rainfall) is February (39mm).

Average rainfall days in December
Numata, Japan

  • Average rainfall days in December: 11.9 days

The month with the highest number of rainy days is July (25.5 days).
The month with the least rainy days is February (7.3 days).

Average snowfall in December
Numata, Japan

  • Average snowfall in December: 207mm

The month with the highest snowfall is January (319mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in December
Numata, Japan

  • Average snowfall days in December: 14.4 days

The month with the highest number of snowfall days is January (20.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

  • Average daylight in December: 9h and 42min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in December: 6h and 24min

The months with the most sunshine are May and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).

Average sunshine days in December
Numata, Japan

  • Average sunshine days in December: 8.2 days

The month with the most sunshine days is May (13.1 days).
The month with the least sunshine days is August (3.8 days).

Average UV index in December
Numata, 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
Numata, Japan

  • Average cloud cover in December: 35

The month with the most cloud cover is July (Cloud cover 48).
The month with the least cloud cover is November (Cloud cover 29).

Average visibility in December
Numata, Japan

  • Average visibility in December: 9km

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