December weather in Signal Hill, CA
The average temperature in Signal Hill in December is 56.7°F (46.6°F–66.7°F). Average precipitation: 2.15 inches.
December is a winter month in Signal Hill, and is cooler than the annual average of 64.9°F. Daily temperatures swing about 20.1°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 9h 46m. For travel, December is a comfortable month to visit.
Avg High
66.7°F
Avg Low
46.6°F
Precipitation
2.15 in
Daylight
9h 46m
December records in Signal Hill
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 87.1°F (1959) | 37.0°F (1991) | 0.81 in (1952) |
| December 2 | 88.0°F (1958) | 39.9°F (1953) | 1.04 in (2014) |
| December 3 | 91.9°F (1958) | 37.0°F (1973) | 1.64 in (1966) |
| December 4 | 89.1°F (1979) | 37.9°F (1973) | 3.17 in (1974) |
| December 5 | 89.1°F (1979) | 37.0°F (1972) | 1.37 in (1966) |
| December 6 | 86.0°F (1990) | 36.0°F (1968) | 1.81 in (1997) |
| December 7 | 82.9°F (1990) | 30.9°F (1960) | 3.05 in (1992) |
| December 8 | 84.9°F (1975) | 30.9°F (1978) | 0.34 in (1949) |
| December 9 | 87.1°F (2017) | 33.1°F (1960) | 1.52 in (1996) |
| December 10 | 86.0°F (1950) | 36.0°F (1972) | 0.34 in (1984) |
| December 11 | 84.9°F (2017) | 34.0°F (1949) | 1.14 in (1996) |
| December 12 | 87.1°F (2010) | 32.0°F (1949) | 1.54 in (2014) |
| December 13 | 82.9°F (1953) | 35.1°F (1949) | 0.85 in (1995) |
| December 14 | 82.9°F (1953) | 33.1°F (1967) | 0.88 in (2021) |
| December 15 | 84.0°F (1980) | 36.0°F (1972) | 1.38 in (2008) |
| December 16 | 89.1°F (1980) | 37.9°F (1971) | 1.08 in (2002) |
| December 17 | 84.9°F (1950) | 37.9°F (1984) | 0.98 in (2010) |
| December 18 | 84.9°F (1985) | 37.0°F (1960) | 1.94 in (1970) |
| December 19 | 84.9°F (1985) | 36.0°F (2006) | 2.07 in (2010) |
| December 20 | 82.9°F (1960) | 35.1°F (1978) | 2.03 in (2010) |
| December 21 | 82.9°F (2020) | 30.9°F (1968) | 1.21 in (2010) |
| December 22 | 84.0°F (1960) | 28.0°F (1990) | 1.53 in (2010) |
| December 23 | 84.9°F (1989) | 30.0°F (1990) | 1.32 in (2021) |
| December 24 | 84.9°F (1985) | 32.0°F (1974) | 1.75 in (1971) |
| December 25 | 84.0°F (1956) | 30.9°F (1974) | 1.03 in (2019) |
| December 26 | 82.9°F (1956) | 32.0°F (1987) | 1.40 in (2025) |
| December 27 | 84.9°F (1956) | 34.0°F (1966) | 1.43 in (1971) |
| December 28 | 84.9°F (1956) | 32.0°F (1962) | 1.90 in (2004) |
| December 29 | 87.1°F (1980) | 34.0°F (1954) | 2.20 in (1951) |
| December 30 | 89.1°F (1980) | 36.0°F (1955) | 2.07 in (2021) |
| December 31 | 82.0°F (1963) | 35.1°F (1982) | 1.15 in (2022) |