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
In Snoqualmie Pass, the lowest average temperatures are observed in December, with a high of 30.2°F (-1°C) and a low of 20.3°F (-6.5°C).Humidity
In Snoqualmie Pass, the average relative humidity in December is 92%.Rainfall
In Snoqualmie Pass, Washington, during December, the rain falls for 8.1 days and regularly aggregates up to 4.02" (102mm) of precipitation. In Snoqualmie Pass, during the entire year, the rain falls for 127.9 days and collects up to 28.58" (726mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Snoqualmie Pass, in December, during 22.3 snowfall days, 27.24" (692mm) of snow is typically accumulated. In Snoqualmie Pass, during the entire year, snow falls for 135.3 days and aggregates up to 134.33" (3412mm) of snow.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:33 am and sunset at 4:16 pm. On the last day of December, sunrise is at 7:52 am and sunset at 4:25 pm PST.
Sunshine
The average sunshine in December in Snoqualmie Pass is 3.1h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 1 translates into these guidelines:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
What part of the year is the coldest in Snoqualmie Pass?
How cold is it in Snoqualmie Pass in December?
What is the average humidity in December in Snoqualmie Pass?
How much does it rain in Snoqualmie Pass in December?
How many days does it snow in December in Snoqualmie Pass?
What is the month with the shortest days in Snoqualmie Pass?
What is the average length of the day in December in Snoqualmie Pass?
When is the sunrise / sunset in December in Snoqualmie Pass?
How long on average sun shines in December in Snoqualmie Pass?
What is the month with the lowest UV index in Snoqualmie Pass?
What is the UV index reading in December in Snoqualmie Pass?
Average temperature in December
Snoqualmie Pass, WA
- Average high temperature in December: 30.2°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 (30.2°F).
- Average low temperature in December: 20.3°F
The month with the highest average low temperature is August (45°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure in December
Snoqualmie Pass, WA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).
Average wind speed in December
Snoqualmie Pass, WA
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in December
Snoqualmie Pass, WA
- Average humidity in December: 92%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Snoqualmie Pass, WA
- Average rainfall in December: 4.02"
The wettest month (with the highest rainfall) is January (4.21").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in December
Snoqualmie Pass, WA
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in December
Snoqualmie Pass, WA
- Average snowfall in December: 27.24"
The month with the highest snowfall is January (27.72").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Snoqualmie Pass, WA
- Average snowfall days in December: 22.3 days
The month with the highest number of snowfall days is December (22.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Snoqualmie Pass, WA
- Average daylight in December: 8h and 3min
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 1min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 0min).
Average sunshine days in December
Snoqualmie Pass, WA
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is August (20.2 days).
The month with the least sunshine days is February (6 days).
Average UV index in December
Snoqualmie Pass, WA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Snoqualmie Pass, WA
- Average cloud cover in December: 70
The month with the most cloud cover is February (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Snoqualmie Pass, WA
- Average visibility in December: 3mi
The months with the highest visibility are June, July and August (5mi).
The months with the lowest visibility are January, February, March and December (3mi).
Snoqualmie Pass, Washington, USA
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