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, with its average high-temperature of 40.8°F (4.9°C) and an average low-temperature of 27.1°F (-2.7°C), holds the record as the coldest month.Humidity
The average relative humidity in December is 79%.Rainfall
In Mount Shasta, in December, it is raining for 9.5 days, with typically 4.02" (102mm) of accumulated precipitation. Throughout the year, in Mount Shasta, there are 90.7 rainfall days, and 26.38" (670mm) of precipitation is accumulated.Snowfall
Months with snowfall in Mount Shasta are January through May, September through December. In Mount Shasta, in December, snow falls for 10.9 days, with typically accumulated 12.68" (322mm) of snow. In Mount Shasta, during the entire year, snow falls for 50.2 days and aggregates up to 81.42" (2068mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:16 am and sunset at 4:40 pm. On the last day of December, in Mount Shasta, sunrise is at 7:34 am and sunset at 4:50 pm PST.
Sunshine
December has the least sunshine of the year in Mount Shasta, with an average of 5.4h of sunshine.UV index
The months with the lowest UV index in Mount Shasta are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. 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.
Frequently asked questions
What are the coldest months in Mount Shasta?
Is December cold in Mount Shasta?
What is the average humidity in December in Mount Shasta?
How much does it rain in Mount Shasta in December?
How much does it snow in Mount Shasta in December?
What is the month with the shortest days in Mount Shasta?
What is the average length of the day in December in Mount Shasta?
When is the sunrise / sunset in December in Mount Shasta?
What is the month with the least sunshine in Mount Shasta?
How long on average sun shines in December in Mount Shasta?
What is the month with the lowest UV index in Mount Shasta?
What is the UV index reading in December in Mount Shasta?
Average temperature in December
Mount Shasta, CA
- Average high temperature in December: 40.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (40.8°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (52.2°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).
Average pressure in December
Mount Shasta, CA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.94"Hg).
Average wind speed in December
Mount Shasta, CA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in December
Mount Shasta, CA
- Average humidity in December: 79%
The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (45%).
Average rainfall in December
Mount Shasta, CA
- Average rainfall in December: 4.02"
The wettest month (with the highest rainfall) is March (4.69").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Mount Shasta, CA
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (2.3 days).
Average snowfall in December
Mount Shasta, CA
- Average snowfall in December: 12.68"
The month with the highest snowfall is January (19.21").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Mount Shasta, CA
- Average snowfall days in December: 10.9 days
The month with the highest number of snowfall days is December (10.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Mount Shasta, CA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in December
Mount Shasta, CA
- Average sunshine days in December: 14.9 days
The months with the most sunshine days are July and August (25.7 days).
The month with the least sunshine days is March (12.3 days).
Average UV index in December
Mount Shasta, CA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Mount Shasta, CA
- Average cloud cover in December: 43
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Mount Shasta, CA
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Mount Shasta, California, USA
Weather forecast for your location
2. Allow the app to use your location
