December weather forecastGlacier, WA
December
Weather in December
The first month of the winter, December, is also an icy month in Glacier, Washington, with an average temperature varying between 26.1°F (-3.3°C) and 35.6°F (2°C).Temperature
With average high and low temperatures of 35.6°F (2°C) and 26.1°F (-3.3°C) respectively, December is Glacier's coldest month.Humidity
In Glacier, the average relative humidity in December is 88%.Rainfall
In Glacier, in December, it is raining for 15.4 days, with typically 9.13" (232mm) of accumulated precipitation. Throughout the year, there are 194.4 rainfall days, and 69.29" (1760mm) of precipitation is accumulated.Snowfall
Months with snowfall in Glacier are January through May, October through December. In Glacier, in December, snow falls for 11.4 days, with typically accumulated 14.09" (358mm) of snow. Throughout the year, there are 51.2 snowfall days, and 83.11" (2111mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 18min of daylight.On the first day of the month, sunrise is at 7:40 am and sunset at 4:13 pm. On the last day of December, sunrise is at 8:01 am and sunset at 4:21 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 3.3h of sunshine.UV index
The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, a regular UV index of 2 translates into these guidelines:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Glacier, WA
- Average high temperature in December: 35.6°F
The warmest month (with the highest average high temperature) is August (71.2°F).
The month with the lowest average high temperature is December (35.6°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (26.1°F).
Average pressure in December
Glacier, WA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are May, June, August and September (30"Hg).
Average wind speed in December
Glacier, WA
- Average wind speed in December: 4.3mph
The windiest month (with the highest average wind speed) is January (4.6mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in December
Glacier, WA
- Average humidity in December: 88%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is July (74%).
Average rainfall in December
Glacier, WA
- Average rainfall in December: 9.13"
The wettest month (with the highest rainfall) is January (10.39").
The driest month (with the least rainfall) is July (1.5").
Average rainfall days in December
Glacier, WA
- Average rainfall days in December: 15.4 days
The month with the highest number of rainy days is April (21.3 days).
The month with the least rainy days is August (10.3 days).
Average snowfall in December
Glacier, WA
- Average snowfall in December: 14.09"
The month with the highest snowfall is February (22.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Glacier, WA
- Average snowfall days in December: 11.4 days
The month with the highest number of snowfall days is December (11.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Glacier, WA
- Average daylight in December: 8h and 18min
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 18min).
- Average sunshine in December: 3h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 18min).
Average sunshine days in December
Glacier, WA
- Average sunshine days in December: 8.6 days
The month with the most sunshine days is August (18.1 days).
The month with the least sunshine days is April (6.8 days).
Average UV index in December
Glacier, 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 and November (UV index 1).
Average cloud cover in December
Glacier, WA
- Average cloud cover in December: 64
The month with the most cloud cover is March (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Glacier, WA
- Average visibility in December: 4mi
The months with the highest visibility are June, July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (4mi).
