December weather forecastHarrington, WA
December
Weather in December
December, the first month of the winter in Harrington, is still a freezing cold month, with temperature in the range of an average high of 31.5°F (-0.3°C) and an average low of 21.9°F (-5.6°C).Temperature
December is the coldest month, with the temperature often reaching an average high of 31.5°F (-0.3°C) and an average low of 21.9°F (-5.6°C).Humidity
In Harrington, the average relative humidity in December is 86%.Rainfall
In Harrington, Washington, in December, it is raining for 9.1 days, with typically 1.89" (48mm) of accumulated precipitation. In Harrington, Washington, during the entire year, the rain falls for 127.9 days and collects up to 15.71" (399mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Harrington, in December, during 15.9 snowfall days, 9.02" (229mm) of snow is typically accumulated. Throughout the year, in Harrington, Washington, there are 65.1 snowfall days, and 37.36" (949mm) of snow is accumulated.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year in Harrington.On the first day of the month, sunrise is at 7:20 am and sunset at 4:03 pm. On the last day of December, sunrise is at 7:40 am and sunset at 4:12 pm PST.
Sunshine
December has the least sunshine of the year in Harrington, with an average of 4.1h of sunshine.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Harrington. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 2 in December translates into this advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Harrington, WA
- Average high temperature in December: 31.5°F
The warmest months (with the highest average high temperature) are July and August (83.3°F).
The month with the lowest average high temperature is December (31.5°F).
- Average low temperature in December: 21.9°F
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).
Average pressure in December
Harrington, WA
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in December
Harrington, WA
- Average wind speed in December: 6.6mph
The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Harrington, WA
- Average humidity in December: 86%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (37%).
Average rainfall in December
Harrington, WA
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is March (1.97").
The driest months (with the least rainfall) are July and August (0.31").
Average rainfall days in December
Harrington, WA
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in December
Harrington, WA
- Average snowfall in December: 9.02"
The month with the highest snowfall is January (10").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Harrington, WA
- Average snowfall days in December: 15.9 days
The month with the highest number of snowfall days is December (15.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Harrington, 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: 4h and 6min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in December
Harrington, WA
- Average sunshine days in December: 12.8 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is March (10.2 days).
Average UV index in December
Harrington, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Harrington, WA
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in December
Harrington, WA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
