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
Sedro-Woolley, Washington, records the coldest temperatures in December, averaging a high of 40.5°F (4.7°C) and a low of 32.5°F (0.3°C).Humidity
The average relative humidity in December is 85%.Rainfall
In December, in Sedro-Woolley, the rain falls for 20.6 days. Throughout December, 6.06" (154mm) of precipitation is accumulated. In Sedro-Woolley, Washington, during the entire year, the rain falls for 203.2 days and collects up to 49.72" (1263mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 2.1 days. Throughout December, 1.1" (28mm) of snow is accumulated. Throughout the year, there are 12 snowfall days, and 12.32" (313mm) of snow is accumulated.Daylight
With an average of 8h and 24min of daylight, December has the shortest days of the year in Sedro-Woolley, Washington.On the first day of December in Sedro-Woolley, sunrise is at 7:40 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 4:23 pm PST.
Sunshine
With an average of 3.5h of sunshine, December has the least sunshine of the year.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Sedro-Woolley. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 2 in December transforms into the following instructions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
What is the coldest time of year in Sedro-Woolley?
Is it cold in Sedro-Woolley during December?
What is the average humidity in December in Sedro-Woolley?
How many days does it rain in December in Sedro-Woolley?
How many days does it snow in December in Sedro-Woolley?
What is the month with the shortest days in Sedro-Woolley?
What is the average length of the day in December in Sedro-Woolley?
When is the sunrise / sunset in December in Sedro-Woolley?
What is the month with the least sunshine in Sedro-Woolley?
How many hours of sunshine does Sedro-Woolley have in December?
When is the lowest UV index in Sedro-Woolley?
What is the UV index reading in December in Sedro-Woolley?
Average temperature in December
Sedro-Woolley, WA
- Average high temperature in December: 40.5°F
The warmest month (with the highest average high temperature) is July (70.9°F).
The month with the lowest average high temperature is December (40.5°F).
- Average low temperature in December: 32.5°F
The month with the highest average low temperature is August (50.5°F).
The coldest months (with the lowest average low temperature) are February and December (32.5°F).
Average pressure in December
Sedro-Woolley, WA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Sedro-Woolley, WA
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is November (5.7mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in December
Sedro-Woolley, WA
- Average humidity in December: 85%
The months with the highest relative humidity are January, February and March (86%).
The month with the lowest relative humidity is July (75%).
Average rainfall in December
Sedro-Woolley, WA
- Average rainfall in December: 6.06"
The wettest month (with the highest rainfall) is November (7.09").
The driest month (with the least rainfall) is July (0.98").
Average rainfall days in December
Sedro-Woolley, WA
- Average rainfall days in December: 20.6 days
The month with the highest number of rainy days is March (22.1 days).
The month with the least rainy days is August (9.4 days).
Average snowfall in December
Sedro-Woolley, WA
- Average snowfall in December: 1.1"
The month with the highest snowfall is February (4.96").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Sedro-Woolley, WA
- Average snowfall days in December: 2.1 days
The month with the highest number of snowfall days is February (4.3 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
Sedro-Woolley, WA
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 3h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in December
Sedro-Woolley, WA
- Average sunshine days in December: 9 days
The month with the most sunshine days is August (19.2 days).
The month with the least sunshine days is March (7.3 days).
Average UV index in December
Sedro-Woolley, 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, March, October, November and December (UV index 2).
Average cloud cover in December
Sedro-Woolley, WA
- Average cloud cover in December: 62
The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Sedro-Woolley, 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).
Sedro-Woolley, Washington, USA
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