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
December, having an average high-temperature of 35.2°F (1.8°C) and an average low-temperature of 23.9°F (-4.5°C), is the coldest month.Humidity
In December, the average relative humidity is 83%.Rainfall
In White Swan, in December, during 10.6 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 112.8 rainfall days, and 10.28" (261mm) of precipitation is accumulated.Snowfall
January through April, September, November and December are months with snowfall. In White Swan, in December, during 5.5 snowfall days, 2.87" (73mm) of snow is typically accumulated. In White Swan, Washington, during the entire year, snow falls for 19.9 days and aggregates up to 12.36" (314mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of December, sunrise is at 7:26 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 4:26 pm PST.
Sunshine
In White Swan, the average sunshine in December is 5.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is it in December?
What is the average humidity in December?
How much does it rain in White Swan in December?
How much does it snow in December?
What is the month with the shortest days in White Swan?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
How high is the UV index in December in White Swan?
Average temperature in December
White Swan, WA
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is August (83.1°F).
The month with the lowest average high temperature is December (35.2°F).
- Average low temperature in December: 23.9°F
The month with the highest average low temperature is August (56.8°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in December
White Swan, WA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in December
White Swan, WA
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is December (4.5mph).
Average humidity in December
White Swan, WA
- Average humidity in December: 83%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (43%).
Average rainfall in December
White Swan, WA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is January (1.61").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in December
White Swan, WA
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is March (13.7 days).
The month with the least rainy days is July (3.1 days).
Average snowfall in December
White Swan, WA
- Average snowfall in December: 2.87"
The month with the highest snowfall is February (3.5").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in December
White Swan, WA
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is December (5.5 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
White Swan, WA
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 5h and 4min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
White Swan, WA
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is July (25.9 days).
The month with the least sunshine days is February (12.6 days).
Average UV index in December
White Swan, 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
White Swan, WA
- Average cloud cover in December: 40
The month with the most cloud cover is January (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in December
White Swan, WA
- Average visibility in December: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
White Swan, Washington, USA
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