December weather in Shasta Lake, CA
The average temperature in Shasta Lake in December is 47.4°F (40.6°F–54.2°F). Average precipitation: 11.99 inches.
December is a winter month in Shasta Lake, and is cooler than the annual average of 63.5°F. Daily temperatures swing about 13.6°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 9h 6m. For travel, December is a wet month.
Avg High
54.2°F
Avg Low
40.6°F
Precipitation
11.99 in
Daylight
9h 6m
December records in Shasta Lake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 75.9°F (2021) | 28.9°F (2025) | 5.20 in (1951) |
| December 2 | 80.1°F (2021) | 30.9°F (2022) | 3.57 in (1961) |
| December 3 | 80.1°F (2021) | 30.9°F (1950) | 8.48 in (1980) |
| December 4 | 72.0°F (1958) | 32.0°F (1971) | 3.96 in (1980) |
| December 5 | 68.0°F (1962) | 28.9°F (1972) | 5.27 in (1966) |
| December 6 | 66.9°F (2006) | 28.0°F (1972) | 3.22 in (1954) |
| December 7 | 70.0°F (1976) | 27.0°F (1972) | 3.96 in (1952) |
| December 8 | 71.1°F (1944) | 21.9°F (1972) | 5.78 in (1993) |
| December 9 | 73.9°F (1975) | 19.9°F (1972) | 2.52 in (1992) |
| December 10 | 71.1°F (1957) | 21.0°F (1972) | 3.69 in (1996) |
| December 11 | 70.0°F (1988) | 25.0°F (1972) | 6.09 in (2014) |
| December 12 | 71.1°F (1944) | 27.0°F (1972) | 8.71 in (1995) |
| December 13 | 66.9°F (1944) | 25.0°F (2025) | 2.02 in (2015) |
| December 14 | 68.0°F (1988) | 26.1°F (2025) | 5.94 in (2002) |
| December 15 | 71.1°F (2017) | 27.0°F (1972) | 3.82 in (2002) |
| December 16 | 72.0°F (1980) | 27.0°F (1972) | 3.98 in (2002) |
| December 17 | 73.0°F (1980) | 30.0°F (1967) | 3.70 in (1982) |
| December 18 | 70.0°F (1998) | 28.0°F (2008) | 2.64 in (1955) |
| December 19 | 70.0°F (2004) | 28.0°F (2008) | 5.92 in (1955) |
| December 20 | 68.0°F (1999) | 25.0°F (1990) | 6.36 in (1955) |
| December 21 | 68.0°F (1999) | 14.0°F (1990) | 4.37 in (2002) |
| December 22 | 68.0°F (1960) | 14.0°F (1990) | 11.64 in (1964) |
| December 23 | 66.9°F (1960) | 19.9°F (1990) | 3.58 in (1964) |
| December 24 | 71.1°F (1985) | 26.1°F (1990) | 3.28 in (2003) |
| December 25 | 71.1°F (1985) | 27.0°F (1993) | 1.47 in (1983) |
| December 26 | 71.1°F (1985) | 28.9°F (1988) | 1.64 in (2005) |
| December 27 | 66.0°F (1956) | 28.9°F (1985) | 5.50 in (1951) |
| December 28 | 68.0°F (1956) | 28.9°F (1988) | 3.79 in (2002) |
| December 29 | 71.1°F (1956) | 24.1°F (1999) | 3.50 in (2024) |
| December 30 | 69.1°F (1997) | 30.0°F (1961) | 3.11 in (1996) |
| December 31 | 66.9°F (1989) | 28.9°F (1961) | 5.20 in (1996) |