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
Weather in December
Temperature
December's arrival corresponds with a decrease in average high-temperatures, from November's comfortable 16.7°C (62.1°F) to a cool 11.5°C (52.7°F). Usui's December nights witness minimal differential from the daytime temperatures, with averages of 6.7°C (44.1°F).Humidity
In Usui, the average relative humidity in December is 64%.Rainfall
In Usui, Japan, in December, during 7 rainfall days, 12mm (0.47") of precipitation is typically accumulated. In Usui, during the entire year, the rain falls for 110.2 days and collects up to 221mm (8.7") of precipitation.Snowfall
In Usui, snow does not fall in March through December.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 06:30 and sunset at 16:25. On the last day of December, sunrise is at 06:48 and sunset at 16:35 JST.
Sunshine
The average sunshine in December in Usui, Japan, is 6h.UV index
The months with the lowest UV index in Usui, Japan, are January through March and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Frequently asked questions
What are December temperatures in Usui?
What is the average humidity in December in Usui?
How much does it rain in Usui in December?
When it does not snow in Usui?
Does it snow in Usui in December?
What is the month with the shortest days in Usui?
How many hours of daylight does Usui have in December?
What time are sunrise and sunset in December in Usui?
How many hours of sunshine does Usui have in December?
When is the lowest UV index in Usui?
How high is the UV index in December in Usui?
Average temperature in December
Usui, Japan
- Average high temperature in December: 11.5°C
The warmest month (with the highest average high temperature) is August (30.3°C).
The month with the lowest average high temperature is January (9.1°C).
- Average low temperature in December: 6.7°C
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (3.7°C).
Average pressure in December
Usui, Japan
- Average pressure in December: 1016mbar
The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in December
Usui, Japan
- Average wind speed in December: 14.6km/h
The windiest month (with the highest average wind speed) is March (16.5km/h).
The calmest month (with the lowest average wind speed) is June (12.7km/h).
Average humidity in December
Usui, Japan
- Average humidity in December: 64%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is January (61%).
Average rainfall in December
Usui, Japan
- Average rainfall in December: 12mm
The wettest month (with the highest rainfall) is October (29mm).
The driest month (with the least rainfall) is January (9mm).
Average rainfall days in December
Usui, Japan
- Average rainfall days in December: 7 days
The month with the highest number of rainy days is October (11.4 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Usui, Japan
- Average snowfall in December: 0mm
The month with the highest snowfall is February (4mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in December
Usui, Japan
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Usui, 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 0min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in December
Usui, Japan
- Average sunshine days in December: 21.2 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is October (15.6 days).
Average UV index in December
Usui, Japan
- Average UV index in December: 3
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, March and December (UV index 3).
Average cloud cover in December
Usui, Japan
- Average cloud cover in December: 32
The month with the most cloud cover is June (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 30).
Average visibility in December
Usui, 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).
Usui, Japan
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