December weather forecastVaughn, WA
December
Weather in December
December, the first month of the winter in Vaughn, is also an icy month, with temperature in the range of an average low of 33.8°F (1°C) and an average high of 42.3°F (5.7°C).Temperature
The coldest period tends to be December, when average temperatures fluctuate between a high of 42.3°F (5.7°C) and a low of 33.8°F (1°C).Humidity
December is the most humid month in Vaughn, with an average relative humidity of 88%.Rainfall
December is the month with the most rainfall in Vaughn. Rain falls for 18.3 days and accumulates 5" (127mm) of precipitation.Snowfall
Months with snowfall in Vaughn are January through April, November and December. In December, in Vaughn, it is snowing for 2.6 days. Throughout December, 0.83" (21mm) of snow is accumulated. Throughout the year, there are 12.1 snowfall days, and 7.05" (179mm) of snow is accumulated.Daylight
December has the shortest days of the year in Vaughn, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 7:38 am and sunset at 4:22 pm. On the last day of December, sunrise is at 7:58 am and sunset at 4:30 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 3.8h 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 Vaughn. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Vaughn, WA
- Average high temperature in December: 42.3°F
The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in December: 33.8°F
The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (33.8°F).
Average pressure in December
Vaughn, WA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in December
Vaughn, WA
- Average wind speed in December: 4.4mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity in December
Vaughn, WA
- Average humidity in December: 88%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Vaughn, WA
- Average rainfall in December: 5"
The wettest month (with the highest rainfall) is December (5").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Vaughn, WA
- Average rainfall days in December: 18.3 days
The month with the highest number of rainy days is March (19.7 days).
The month with the least rainy days is August (6 days).
Average snowfall in December
Vaughn, WA
- Average snowfall in December: 0.83"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Vaughn, WA
- Average snowfall days in December: 2.6 days
The month with the highest number of snowfall days is February (3.8 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
Vaughn, 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: 3h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in December
Vaughn, WA
- Average sunshine days in December: 10.2 days
The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is November (8.7 days).
Average UV index in December
Vaughn, 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
Vaughn, WA
- Average cloud cover in December: 60
The month with the most cloud cover is December (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in December
Vaughn, WA
- Average visibility in December: 4mi
The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, November and December (4mi).
