Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
With the onset of December, Tetaru experiences a modest temperature adjustment, with the average high-temperature receding from a refreshing 13°C (55.4°F) in November to a frosty 6.9°C (44.4°F). Throughout December, Tetaru observes a steady low-temperature average of 2.2°C (36°F), reflecting a minor dip from daytime highs.Humidity
The average relative humidity in December is 74%.Rainfall
In Tetaru, in December, during 10.1 rainfall days, 32mm (1.26") of precipitation is typically accumulated. In Tetaru, during the entire year, the rain falls for 134.2 days and collects up to 724mm (28.5") of precipitation.Snowfall
January through April and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 5.2 snowfall days, it receives 28mm (1.1") of snow. In Tetaru, during the entire year, snow falls for 24.2 days and aggregates up to 190mm (7.48") of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 06:33 and sunset at 16:15. On the last day of the month, sunrise is at 06:52 and sunset at 16:24 JST.
Sunshine
The average sunshine in December is 5.4h.UV index
January through March and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. To cut down UV radiation exposure by about half, sport a wide-brim hat. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during December?
What is the average humidity in December?
How many days does it rain in December?
When does it start snowing?
What is the month with the shortest days?
How many hours of daylight does Tetaru have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December in Tetaru?
Average temperature in December
Tetaru, Japan
- Average high temperature in December: 6.9°C
The warmest month (with the highest average high temperature) is August (27.7°C).
The month with the lowest average high temperature is January (3.8°C).
- Average low temperature in December: 2.2°C
The month with the highest average low temperature is August (21.7°C).
The coldest month (with the lowest average low temperature) is February (-1°C).
Average pressure in December
Tetaru, Japan
- Average pressure in December: 1016.1mbar
The month with the highest atmospheric pressure is November (1018.6mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).
Average wind speed in December
Tetaru, Japan
- Average wind speed in December: 15km/h
The windiest month (with the highest average wind speed) is January (15.4km/h).
The calmest month (with the lowest average wind speed) is July (9km/h).
Average humidity in December
Tetaru, Japan
- Average humidity in December: 74%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Tetaru, Japan
- Average rainfall in December: 32mm
The wettest month (with the highest rainfall) is October (105mm).
The driest month (with the least rainfall) is February (23mm).
Average rainfall days in December
Tetaru, Japan
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is February (7.3 days).
Average snowfall in December
Tetaru, Japan
- Average snowfall in December: 28mm
The month with the highest snowfall is January (62mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Tetaru, Japan
- Average snowfall days in December: 5.2 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Tetaru, Japan
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is May (Average sunshine: 9h and 30min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in December
Tetaru, Japan
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is May (21.3 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in December
Tetaru, Japan
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in December
Tetaru, Japan
- Average cloud cover in December: 42
The month with the most cloud cover is July (Cloud cover 48).
The months with the least cloud cover are May and November (Cloud cover 36).
Average visibility in December
Tetaru, Japan
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, October, November and December (10km).
The months with the lowest visibility are January, May, June, July, August and September (9km).
