December weather forecast
Shinyamashita, Japan

December

Weather in December

December, the first month of the winter in Shinyamashita, is also a fresh month, with an average temperature fluctuating between 11.7°C (53.1°F) and 6.9°C (44.4°F).

Temperature

As December commences, the average high-temperature shows a reduction, transitioning from an enjoyable 16.7°C (62.1°F) in November to a cool 11.7°C (53.1°F). Shinyamashita maintains an average of approximately a chilly 6.9°C (44.4°F) during December nights, with only a minimal decrease from the daytime temperature.

Humidity

The average relative humidity in December is 63%.

Rainfall

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

Snowfall

In Shinyamashita, snow does not fall in April through December.

Daylight

December has the shortest days of the year in Shinyamashita, 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, sunrise is at 06:50 and sunset at 16:38 JST.

Sunshine

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

UV index

January through March 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 moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 3 during December translates into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Boost your sun resistance with garments that are densely woven yet spacious. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Frequently asked questions

What is the usual temperature for Shinyamashita in December?
December temperatures vary between a high-temperature of 11.7°C (53.1°F) and a low-temperature of 6.9°C (44.4°F). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 36°C (96.8°F).
What is the average humidity in December?
In December, the average relative humidity is 63%.
What is the driest month?
December is the month with the least rainfall. Rain falls for 9 days and accumulates 40mm (1.57") of precipitation.
How many days does it rain in December?
In Shinyamashita, in December, during 9 rainfall days, 40mm (1.57") of precipitation is typically accumulated.
When it does not snow?
April through December are months without snowfall.
Does it snow in December?
In Shinyamashita, in December, it doesn't snow. In January, it regularly snows.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 48min of daylight.
How many hours of daylight does Shinyamashita have in December?
The average day length in December is 9h and 49min.
When are sunrise and sunset in December?
On the first day of December, sunrise is at 06:32 and sunset at 16:28. On the last day of the month, sunrise is at 06:50 and sunset at 16:38 JST.
How long on average sun shines in December?
In December, the average sunshine duration is 6.2h.
What are the months with the lowest UV index?
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 intensity in December?
In December, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to the Sun's 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 daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December
Shinyamashita, 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
Shinyamashita, 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
Shinyamashita, 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
Shinyamashita, 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
Shinyamashita, 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
Shinyamashita, 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
Shinyamashita, 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
Shinyamashita, 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 daylight in December /
Average sunshine in December
Shinyamashita, 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
Shinyamashita, 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
Shinyamashita, 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
Shinyamashita, 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
Shinyamashita, 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).

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