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
Snoqualmie Pass's coldest temperatures are experienced in December, with average high temperatures of 30.2°F (-1°C) and lows of 20.3°F (-6.5°C).Humidity
In December, the average relative humidity in Snoqualmie Pass, Washington, is 92%.Rainfall
In December, in Snoqualmie Pass, the rain falls for 8.1 days. Throughout December, 4.02" (102mm) of precipitation is accumulated. Throughout the year, there are 127.9 rainfall days, and 28.58" (726mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. In Snoqualmie Pass, in December, during 22.3 snowfall days, 27.24" (692mm) of snow is typically accumulated. Throughout the year, there are 135.3 snowfall days, and 134.33" (3412mm) of snow is accumulated.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
In Snoqualmie Pass, the average sunshine in December is 3.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in Snoqualmie Pass in December?
What is the month with the shortest days?
How many hours of daylight does Snoqualmie Pass have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
How high is the UV index in December?
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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