December weather forecastUsk, WA
December
Weather in December
December, the first month of the winter in Usk, is also a subzero cold month, with temperature in the range of an average high of 28.8°F (-1.8°C) and an average low of 18°F (-7.8°C).Temperature
December is the month when Usk, Washington, sees the lowest average temperatures, with a high of 28.8°F (-1.8°C) and a low of 18°F (-7.8°C).Humidity
The average relative humidity in December is 92%.Rainfall
In Usk, in December, during 8.3 rainfall days, 2.87" (73mm) of precipitation is typically accumulated. Throughout the year, there are 130.2 rainfall days, and 24.17" (614mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. In Usk, in December, during 21.7 snowfall days, 20.04" (509mm) of snow is typically accumulated. In Usk, during the entire year, snow falls for 122.5 days and aggregates up to 103.78" (2636mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 24min of daylight.On the first day of December, sunrise is at 7:20 am and sunset at 3:56 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:04 pm PST.
Sunshine
The average sunshine in December is 3.3h.UV index
February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Usk, WA
- Average high temperature in December: 28.8°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in December: 18°F
The month with the highest average low temperature is August (50.2°F).
The coldest months (with the lowest average low temperature) are February and December (18°F).
Average pressure in December
Usk, WA
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Usk, WA
- Average wind speed in December: 3.3mph
The windiest month (with the highest average wind speed) is April (4.4mph).
The calmest month (with the lowest average wind speed) is December (3.3mph).
Average humidity in December
Usk, WA
- Average humidity in December: 92%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (51%).
Average rainfall in December
Usk, WA
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is August (0.51").
Average rainfall days in December
Usk, WA
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is April (17.2 days).
The months with the least rainy days are February and August (6.8 days).
Average snowfall in December
Usk, WA
- Average snowfall in December: 20.04"
The month with the highest snowfall is January (23.39").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Usk, WA
- Average snowfall days in December: 21.7 days
The month with the highest number of snowfall days is December (21.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Usk, WA
- Average daylight in December: 8h and 24min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 3h and 18min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Usk, WA
- Average sunshine days in December: 9.4 days
The month with the most sunshine days is August (21.9 days).
The months with the least sunshine days are February, March and April (7.8 days).
Average UV index in December
Usk, WA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 1).
Average cloud cover in December
Usk, WA
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Usk, WA
- Average visibility in December: 3mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
