December weather in Mount Shasta, CA
The average temperature in Mount Shasta in December is 34.8°F (26.9°F–42.7°F). Average precipitation: 7.78 inches. Average snowfall is 26.1 inches.
December is a winter month in Mount Shasta, and is cooler than the annual average of 50°F. Daily temperatures swing about 15.8°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 9h 2m. For travel, December is a wet month.
Avg High
42.7°F
Avg Low
26.9°F
Precipitation
7.78 in
Snow
26.1 in
December records in Mount Shasta
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 66.0°F (1972) | 12.0°F (2007) | 4.14 in (1960) |
| December 2 | 63.0°F (1958) | 16.0°F (1996) | 3.70 in (2012) |
| December 3 | 66.0°F (1958) | 17.1°F (1948) | 2.74 in (1974) |
| December 4 | 64.9°F (2020) | 12.0°F (1992) | 2.66 in (1966) |
| December 5 | 62.1°F (1958) | 5.0°F (2013) | 2.45 in (1954) |
| December 6 | 62.1°F (1965) | 9.0°F (1956) | 4.08 in (1952) |
| December 7 | 61.0°F (2006) | 8.1°F (2009) | 2.05 in (1996) |
| December 8 | 62.1°F (1959) | -2.9°F (2013) | 2.90 in (2004) |
| December 9 | 63.0°F (1975) | -5.1°F (1972) | 4.15 in (1996) |
| December 10 | 64.9°F (1958) | -5.1°F (1972) | 2.77 in (1968) |
| December 11 | 72.0°F (1958) | -2.0°F (1972) | 2.48 in (1969) |
| December 12 | 61.0°F (1957) | 12.0°F (1967) | 4.81 in (1995) |
| December 13 | 57.0°F (1956) | 8.1°F (1972) | 2.30 in (2002) |
| December 14 | 66.0°F (1958) | 8.1°F (1967) | 4.90 in (2002) |
| December 15 | 61.0°F (1958) | 7.0°F (1948) | 2.08 in (1995) |
| December 16 | 66.0°F (1953) | 5.0°F (2008) | 3.05 in (2002) |
| December 17 | 68.0°F (1958) | 3.0°F (2008) | 1.36 in (1957) |
| December 18 | 64.9°F (1958) | 8.1°F (2008) | 2.84 in (1955) |
| December 19 | 61.0°F (1959) | 7.0°F (1967) | 2.28 in (1981) |
| December 20 | 63.0°F (2020) | 8.1°F (1978) | 2.20 in (1969) |
| December 21 | 57.9°F (2013) | -6.0°F (1998) | 4.01 in (1955) |
| December 22 | 63.0°F (2013) | -13.0°F (1990) | 4.01 in (1964) |
| December 23 | 62.1°F (1960) | -0.9°F (1990) | 1.56 in (1979) |
| December 24 | 64.0°F (1950) | 1.0°F (1990) | 2.81 in (2025) |
| December 25 | 59.0°F (2013) | 10.0°F (1970) | 2.02 in (1955) |
| December 26 | 62.1°F (2013) | 10.0°F (2016) | 2.72 in (1951) |
| December 27 | 59.0°F (1999) | 9.0°F (1954) | 2.30 in (2005) |
| December 28 | 57.9°F (1949) | 5.0°F (2016) | 3.80 in (2002) |
| December 29 | 64.9°F (1956) | 7.0°F (1982) | 2.37 in (1996) |
| December 30 | 63.0°F (2013) | 1.9°F (1990) | 3.10 in (1996) |
| December 31 | 64.0°F (2013) | 9.0°F (1964) | 2.65 in (1992) |