December weather forecastShimotsui, Japan
December
Weather in December
December, the first month of the winter in Shimotsui, is still a cool month, with an average temperature ranging between max 10.3°C (50.5°F) and min 5.6°C (42.1°F).Temperature
The transition into December involves a decrease in the average high-temperature, falling from a mild 15.9°C (60.6°F) in November to a cool 10.3°C (50.5°F). A modest nighttime temperature average of 5.6°C (42.1°F) characterizes December.Humidity
In Shimotsui, Japan, the average relative humidity in December is 72%.Rainfall
In Shimotsui, during December, the rain falls for 10.2 days and regularly aggregates up to 22mm (0.87") of precipitation. In Shimotsui, during the entire year, the rain falls for 133 days and collects up to 442mm (17.4") of precipitation.Snowfall
Months with snowfall are January, February and December. December is the first month it typically snows. Throughout December, in the average 1.3 snowfall days, it receives 1mm (0.04") of snow. In Shimotsui, during the entire year, snow falls for 5.5 days and aggregates up to 14mm (0.55") of snow.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 06:53 and sunset at 16:54. On the last day of December, sunrise is at 07:11 and sunset at 17:04 JST.
Sunshine
January, February and December, with an average of 5.1h of sunshine, are months with the least sunshine.UV index
January 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 minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Shimotsui, Japan
- Average high temperature in December: 10.3°C
The warmest month (with the highest average high temperature) is August (30.7°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in December: 5.6°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 (3.1°C).
Average pressure in December
Shimotsui, Japan
- Average pressure in December: 1020.1mbar
The month with the highest atmospheric pressure is January (1020.5mbar).
The month with the lowest atmospheric pressure is June (1008.5mbar).
Average wind speed in December
Shimotsui, Japan
- Average wind speed in December: 14.6km/h
The windiest months (with the highest average wind speed) are January and December (14.6km/h).
The calmest month (with the lowest average wind speed) is June (8.5km/h).
Average humidity in December
Shimotsui, Japan
- Average humidity in December: 72%
The month with the highest relative humidity is July (79%).
The months with the lowest relative humidity are March, April and May (68%).
Average rainfall in December
Shimotsui, Japan
- Average rainfall in December: 22mm
The wettest month (with the highest rainfall) is July (75mm).
The driest month (with the least rainfall) is November (13mm).
Average rainfall days in December
Shimotsui, Japan
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Shimotsui, Japan
- Average snowfall in December: 1mm
The month with the highest snowfall is February (9mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Shimotsui, Japan
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is January (2.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Shimotsui, Japan
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 6min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).
Average sunshine days in December
Shimotsui, Japan
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is May (20.2 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in December
Shimotsui, Japan
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Shimotsui, Japan
- Average cloud cover in December: 41
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Shimotsui, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
