Mount Shasta
California, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Mount Shasta, CA

The serene Lake Siskiyou on the base of Mount Shasta in California, and a view of the planted forest, the far suspension bridge, and snowy mountain peak
The serene Lake Siskiyou on the base of Mount Shasta in California, and a view of the planted forest, the far suspension bridge, and snowy mountain peak
The first month of the winter, December, is also a frosty month in Mount Shasta, California, with average temperature fluctuating between 43.5°F (6.4°C) and 26.2°F (-3.2°C).

Temperature

In Mount Shasta, the average high-temperature slightly decreases, from a cool 50.9°F (10.5°C) in November, to a chilly 43.5°F (6.4°C). In December, the average low-temperature is 26.2°F (-3.2°C).

Rainfall

Months with the most rainfall days are January, March and December, with an average of 13 rainy days.

Snowfall

Months with snowfall are January through May, October through December. Throughout December, 23.8" (604.5mm) of snow is accumulated. In Mount Shasta, during the entire year, snow aggregates up to 102.6" (2606.2mm).

Daylight

December has the shortest days of the year, with an average of 9.2h of daylight.

What is the temperature in December in Mount Shasta?

The average high-temperature, in December, in Mount Shasta, California, is 43.5°F (6.4°C), while the average low-temperature is 26.2°F (-3.2°C).

How many days does it rain in December in Mount Shasta?

In Mount Shasta, California, during December, it is raining for 13 days.

What is the wettest month in Mount Shasta?

The wettest months in Mount Shasta, California, are January, March and December, with an average of 13 rainy days.

How much does it snow in Mount Shasta in December?

During December, Mount Shasta regularly aggregates up to 23.8" (604.5mm) of snow.

What is the month with the shortest days in Mount Shasta?

The month with the shortest days in Mount Shasta is December, with an average of 9.2h of daylight.

How many hours of daylight does Mount Shasta have in December?

In Mount Shasta, the average length of the day in December is 9.2h.
Average temperature in December - Mount Shasta, CA
  • Average high temperature in December: 43.6°F

The warmest month (with the highest average high temperature) is July (87.9°F).
The month with the lowest average high temperature is January (43°F).

  • Average low temperature in December: 26.3°F

The month with the highest average low temperature is July (50.4°F).
The coldest month (with the lowest average low temperature) is January (25.8°F).

Average rainfall days in December - Mount Shasta, CA
  • Average rainfall days in December: 13 days

Months with the highest number of rainy days are January, March and December (13 days).
Months with the lowest number of rainy days are July and August (2 days).

Average snowfall in December - Mount Shasta, CA
  • Average snowfall in December: 23.8"

The month with the highest snowfall is January (27.2").
Months with the lowest snowfall are June, July, August and September (0").

Average daylight in December - Mount Shasta, CA
  • Average daylight in December: 9.2h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.2h).