December weather in Clayton, CA
The average temperature in Clayton in December is 47.4°F (41.3°F–53.4°F). Average precipitation: 5.08 inches.
December is a winter month in Clayton, and is cooler than the annual average of 58.4°F. Daily temperatures swing about 12.1°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 23m. For travel, December is a wet month.
Avg High
53.4°F
Avg Low
41.3°F
Precipitation
5.08 in
Daylight
9h 23m
December records in Clayton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 73.0°F (1956) | 25.0°F (2007) | 1.64 in (1973) |
| December 2 | 73.0°F (1988) | 27.0°F (2007) | 2.88 in (2012) |
| December 3 | 73.9°F (1959) | 32.0°F (2001) | 1.93 in (2014) |
| December 4 | 75.0°F (1979) | 26.1°F (2001) | 2.20 in (2019) |
| December 5 | 75.9°F (1958) | 27.0°F (1972) | 1.48 in (1967) |
| December 6 | 71.1°F (2000) | 28.0°F (2013) | 1.05 in (1955) |
| December 7 | 73.0°F (1989) | 28.0°F (1978) | 2.71 in (1952) |
| December 8 | 72.0°F (1989) | 19.0°F (1972) | 0.88 in (1997) |
| December 9 | 73.0°F (1975) | 18.0°F (1972) | 2.00 in (1992) |
| December 10 | 73.0°F (1975) | 18.0°F (1972) | 1.47 in (1954) |
| December 11 | 73.0°F (1957) | 18.0°F (1972) | 1.97 in (2022) |
| December 12 | 75.9°F (1958) | 26.1°F (1972) | 4.17 in (1995) |
| December 13 | 70.0°F (2010) | 24.1°F (1967) | 1.71 in (2021) |
| December 14 | 72.0°F (2025) | 21.9°F (1967) | 1.52 in (2021) |
| December 15 | 73.0°F (1958) | 24.1°F (1967) | 1.38 in (1977) |
| December 16 | 75.9°F (1980) | 24.1°F (1972) | 2.41 in (2016) |
| December 17 | 77.0°F (1980) | 25.0°F (1999) | 1.15 in (1977) |
| December 18 | 75.0°F (1980) | 27.0°F (2008) | 2.65 in (2005) |
| December 19 | 78.1°F (2007) | 27.0°F (2006) | 1.51 in (2010) |
| December 20 | 75.0°F (1966) | 24.1°F (1990) | 3.15 in (1969) |
| December 21 | 75.0°F (1994) | 19.0°F (1990) | 1.25 in (1969) |
| December 22 | 71.1°F (1985) | 14.0°F (1990) | 2.20 in (1955) |
| December 23 | 68.0°F (1994) | 17.1°F (1990) | 4.85 in (1955) |
| December 24 | 73.9°F (1960) | 25.0°F (1998) | 1.70 in (1955) |
| December 25 | 70.0°F (1985) | 26.1°F (1988) | 1.74 in (1979) |
| December 26 | 73.0°F (1985) | 25.0°F (1990) | 1.21 in (2005) |
| December 27 | 77.0°F (1980) | 23.0°F (1988) | 1.83 in (2022) |
| December 28 | 70.0°F (1956) | 23.0°F (1988) | 2.00 in (1994) |
| December 29 | 73.9°F (1956) | 30.0°F (1952) | 1.28 in (2001) |
| December 30 | 73.9°F (1963) | 24.1°F (1988) | 1.32 in (1981) |
| December 31 | 75.9°F (1980) | 23.0°F (1990) | 3.64 in (2022) |