December weather forecastMossyrock, WA
December
Weather in December
The first month of the winter, December, is still a cold month in Mossyrock, Washington, with an average temperature varying between 41.2°F (5.1°C) and 30.7°F (-0.7°C).Temperature
December, recording an average high temperature of 41.2°F (5.1°C) and a low temperature of 30.7°F (-0.7°C), is Mossyrock's coldest month.Humidity
The average relative humidity in December is 87%.Rainfall
In Mossyrock, in December, it is raining for 17.5 days, with typically 5.83" (148mm) of accumulated precipitation. In Mossyrock, during the entire year, the rain falls for 178.8 days and collects up to 40.47" (1028mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Mossyrock, in December, snow falls for 3.5 days, with typically accumulated 1.77" (45mm) of snow. In Mossyrock, during the entire year, snow falls for 20 days and aggregates up to 17.24" (438mm) of snow.Daylight
The month with the shortest days in Mossyrock is December, with an average of 8h and 36min of daylight.On the first day of the month, sunrise is at 7:34 am and sunset at 4:24 pm. On the last day of December, sunrise is at 7:53 am and sunset at 4:32 pm PST.
Sunshine
The average sunshine in December is 3.9h.UV index
The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Enhance your sun protection with tightly woven, yet airy clothing. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mossyrock, WA
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is December (41.2°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (30.7°F).
Average pressure in December
Mossyrock, WA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Mossyrock, WA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in December
Mossyrock, WA
- Average humidity in December: 87%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is July (71%).
Average rainfall in December
Mossyrock, WA
- Average rainfall in December: 5.83"
The wettest month (with the highest rainfall) is January (6.46").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Mossyrock, WA
- Average rainfall days in December: 17.5 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is July (6.3 days).
Average snowfall in December
Mossyrock, WA
- Average snowfall in December: 1.77"
The month with the highest snowfall is January (5.51").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Mossyrock, WA
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is February (6 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Mossyrock, WA
- Average daylight in December: 8h and 36min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 3h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 3h and 48min).
Average sunshine days in December
Mossyrock, WA
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is August (23.2 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in December
Mossyrock, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in December
Mossyrock, WA
- Average cloud cover in December: 60
The month with the most cloud cover is March (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Mossyrock, WA
- Average visibility in December: 4mi
The months with the highest visibility are July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (4mi).
