December weather forecastShelter Bay, WA
December
Weather in December
The first month of the winter, December, is also a frosty month in Shelter Bay, Washington, with an average temperature varying between 39°F (3.9°C) and 43.7°F (6.5°C).Temperature
The coldest period tends to be December, when average temperatures fluctuate between a high of 43.7°F (6.5°C) and a low of 39°F (3.9°C).Humidity
The average relative humidity in December is 79%.Rainfall
In Shelter Bay, in December, during 13.7 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In Shelter Bay, Washington, during the entire year, the rain falls for 132.4 days and collects up to 8.9" (226mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Shelter Bay, in December, during 1.5 snowfall days, 0.2" (5mm) of snow is typically accumulated. In Shelter Bay, during the entire year, snow falls for 7.6 days and aggregates up to 3.27" (83mm) 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 the month, sunrise is at 7:41 am and sunset at 4:17 pm. On the last day of December, sunrise is at 8:01 am and sunset at 4:25 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 4.5h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Shelter Bay. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Shelter Bay, WA
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is July (66.6°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in December: 39°F
The month with the highest average low temperature is August (56.1°F).
The coldest month (with the lowest average low temperature) is February (38.5°F).
Average pressure in December
Shelter Bay, WA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in December
Shelter Bay, WA
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is November (8.7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in December
Shelter Bay, WA
- Average humidity in December: 79%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is July (76%).
Average rainfall in December
Shelter Bay, WA
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is February (1.3").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in December
Shelter Bay, WA
- Average rainfall days in December: 13.7 days
The month with the highest number of rainy days is December (13.7 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in December
Shelter Bay, WA
- Average snowfall in December: 0.2"
The month with the highest snowfall is February (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Shelter Bay, WA
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is February (2.4 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
Shelter Bay, 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: 4h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).
Average sunshine days in December
Shelter Bay, WA
- Average sunshine days in December: 14.4 days
The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in December
Shelter Bay, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Shelter Bay, WA
- Average cloud cover in December: 53
The month with the most cloud cover is December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in December
Shelter Bay, WA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
