December weather forecastRuston, WA
December
Weather in December
The first month of the winter, December, is also a frosty month in Ruston, Washington, with an average temperature ranging between max 43.7°F (6.5°C) and min 34.3°F (1.3°C).Temperature
December is the month that records the lowest temperatures, with averages ranging from a high of 43.7°F (6.5°C) to a low of 34.3°F (1.3°C).Humidity
January and December, with an average relative humidity of 87%, are the most humid months.Rainfall
The month with the most rainfall is December, when the rain falls for 18.4 days and typically aggregates up to 4.69" (119mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Ruston, in December, snow falls for 1.3 days, with typically accumulated 0.31" (8mm) of snow. Throughout the year, there are 8.9 snowfall days, and 5.04" (128mm) of snow is accumulated.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:37 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:56 am and sunset at 4:29 pm PST.
Sunshine
With an average of 4h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Stay sun-safe with clothing that is both closely woven and worn loosely. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ruston, WA
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in December: 34.3°F
The month with the highest average low temperature is August (52.7°F).
The coldest months (with the lowest average low temperature) are February and December (34.3°F).
Average pressure in December
Ruston, WA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in December
Ruston, WA
- Average wind speed in December: 4.6mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Ruston, WA
- Average humidity in December: 87%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (68%).
Average rainfall in December
Ruston, WA
- Average rainfall in December: 4.69"
The wettest month (with the highest rainfall) is December (4.69").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
Ruston, WA
- Average rainfall days in December: 18.4 days
The month with the highest number of rainy days is March (20.1 days).
The month with the least rainy days is August (5 days).
Average snowfall in December
Ruston, WA
- Average snowfall in December: 0.31"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Ruston, WA
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Ruston, WA
- Average daylight in December: 8h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in December
Ruston, WA
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is August (23.4 days).
The month with the least sunshine days is February (9 days).
Average UV index in December
Ruston, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Ruston, WA
- Average cloud cover in December: 59
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Ruston, WA
- Average visibility in December: 5mi
The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (5mi).
