December weather in Morro Bay, CA
The average temperature in Morro Bay in December is 55.4°F (46.2°F–64.6°F). Average precipitation: 2.75 inches.
December is a winter month in Morro Bay, and is cooler than the annual average of 59.5°F. Daily temperatures swing about 18.4°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 37m. For travel, December is a comfortable month to visit.
Avg High
64.6°F
Avg Low
46.2°F
Precipitation
2.75 in
Daylight
9h 37m
December records in Morro Bay
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 78.1°F (1959) | 30.0°F (1991) | 1.00 in (1960) |
| December 2 | 75.9°F (1976) | 33.1°F (1991) | 0.93 in (1970) |
| December 3 | 79.0°F (1969) | 32.0°F (1989) | 0.95 in (1966) |
| December 4 | 78.1°F (1989) | 36.0°F (1992) | 2.10 in (1974) |
| December 5 | 79.0°F (1959) | 32.0°F (1993) | 1.80 in (1997) |
| December 6 | 78.1°F (1959) | 33.1°F (1991) | 1.68 in (1966) |
| December 7 | 79.0°F (1979) | 32.0°F (1960) | 0.76 in (1972) |
| December 8 | 77.0°F (1975) | 30.0°F (1978) | 0.41 in (2006) |
| December 9 | 78.1°F (1988) | 28.9°F (1972) | 1.60 in (1996) |
| December 10 | 73.0°F (2004) | 32.0°F (1972) | 1.47 in (1996) |
| December 11 | 75.0°F (1980) | 30.9°F (1985) | 1.56 in (1993) |
| December 12 | 75.0°F (1980) | 30.9°F (1985) | 2.33 in (2014) |
| December 13 | 70.0°F (1980) | 28.0°F (1987) | 0.27 in (2003) |
| December 14 | 73.0°F (1989) | 28.9°F (1987) | 1.18 in (2021) |
| December 15 | 75.0°F (1980) | 27.0°F (1967) | 1.00 in (1988) |
| December 16 | 79.0°F (1998) | 32.0°F (1984) | 3.08 in (1962) |
| December 17 | 80.1°F (1980) | 26.1°F (1992) | 0.76 in (2010) |
| December 18 | 72.0°F (1976) | 26.1°F (1992) | 3.65 in (2010) |
| December 19 | 75.9°F (1985) | 27.0°F (1992) | 1.30 in (2002) |
| December 20 | 73.9°F (1960) | 27.0°F (1992) | 0.99 in (1988) |
| December 21 | 73.0°F (1980) | 25.0°F (1990) | 0.97 in (1996) |
| December 22 | 72.0°F (2014) | 21.9°F (1990) | 1.06 in (2019) |
| December 23 | 77.0°F (1989) | 25.0°F (1990) | 1.94 in (2021) |
| December 24 | 78.1°F (1989) | 28.9°F (1987) | 2.10 in (1979) |
| December 25 | 75.0°F (1985) | 27.0°F (1987) | 1.03 in (2025) |
| December 26 | 80.1°F (1980) | 28.0°F (1987) | 0.82 in (1996) |
| December 27 | 75.0°F (1967) | 30.0°F (1962) | 2.45 in (2004) |
| December 28 | 75.9°F (2000) | 30.9°F (1962) | 2.67 in (1977) |
| December 29 | 77.0°F (1980) | 28.9°F (1988) | 1.20 in (1965) |
| December 30 | 81.0°F (1980) | 28.0°F (1992) | 1.59 in (2023) |
| December 31 | 80.1°F (1980) | 28.9°F (1987) | 1.17 in (1976) |