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 is Arlington's coldest month, registering average high temperatures of 41.7°F (5.4°C) and lows of 34°F (1.1°C).Humidity
The months with the highest humidity are January, February, November and December, with an average relative humidity of 85%.Rainfall
In Arlington, in December, it is raining for 19.4 days, with typically 4.53" (115mm) of accumulated precipitation. Throughout the year, in Arlington, there are 188.6 rainfall days, and 34.92" (887mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Arlington. In December, in Arlington, it is snowing for 2 days. Throughout December, 0.67" (17mm) of snow is accumulated. Throughout the year, in Arlington, there are 11.6 snowfall days, and 9.61" (244mm) of snow is accumulated.Daylight
With an average of 8h and 24min of daylight, December has the shortest days of the year in Arlington, Washington.On the first day of the month, sunrise is at 7:38 am and sunset at 4:16 pm. On the last day of December, in Arlington, sunrise is at 7:59 am and sunset at 4:24 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 4.1h of sunshine.UV index
January, February, October through 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 radiation for ordinary individuals.Note: The UV index of 2 in December translates into these instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
What month is the coldest in Arlington?
Is it cold in Arlington during December?
What are the most humid months in Arlington?
What is the average humidity in December in Arlington?
How many days does it rain in December in Arlington?
How much does it snow in Arlington in December?
What is the month with the shortest days in Arlington?
How many hours of daylight does Arlington have in December?
When are sunrise and sunset in December in Arlington?
What is the month with the least sunshine in Arlington?
How long on average sun shines in December in Arlington?
What are the months with the lowest UV index in Arlington?
How high is the UV index in December in Arlington?
Average temperature in December
Arlington, WA
- Average high temperature in December: 41.7°F
The warmest month (with the highest average high temperature) is August (72.3°F).
The month with the lowest average high temperature is December (41.7°F).
- Average low temperature in December: 34°F
The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is February (33.8°F).
Average pressure in December
Arlington, 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
Arlington, WA
- Average wind speed in December: 5.3mph
The windiest months (with the highest average wind speed) are January and November (5.6mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in December
Arlington, WA
- Average humidity in December: 85%
The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is July (73%).
Average rainfall in December
Arlington, WA
- Average rainfall in December: 4.53"
The wettest month (with the highest rainfall) is November (4.92").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in December
Arlington, WA
- Average rainfall days in December: 19.4 days
The month with the highest number of rainy days is March (20.9 days).
The month with the least rainy days is August (6.9 days).
Average snowfall in December
Arlington, WA
- Average snowfall in December: 0.67"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Arlington, WA
- Average snowfall days in December: 2 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
Arlington, WA
- Average daylight in December: 8h and 2min
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 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in December
Arlington, WA
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is August (22 days).
The month with the least sunshine days is March (8.1 days).
Average UV index in December
Arlington, 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, October, November and December (UV index 2).
Average cloud cover in December
Arlington, WA
- Average cloud cover in December: 57
The month with the most cloud cover is December (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility in December
Arlington, WA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, November and December (5mi).
Arlington, Washington, USA
Weather forecast for your location
2. Allow the app to use your location
