December weather in Atascadero, CA
The average temperature in Atascadero in December is °F (°F–°F). Average precipitation: 5.15 inches.
December is a winter month in Atascadero, and is cooler than the annual average of 0°F. Expect about 8 days with precipitation. Daylight averages about 9h 37m.
Avg High
°F
Avg Low
°F
Precipitation
5.15 in
Daylight
9h 37m
December records in Atascadero
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 75.9°F (2013) | 26.1°F (1976) | 2.66 in (1973) |
| December 2 | 75.0°F (2013) | 27.0°F (1976) | 3.02 in (1960) |
| December 3 | 79.0°F (2013) | 26.1°F (1976) | 3.30 in (1966) |
| December 4 | 73.0°F (2011) | 25.0°F (2011) | 2.47 in (2022) |
| December 5 | 68.0°F (1963) | 18.0°F (2013) | 2.55 in (1966) |
| December 6 | 73.0°F (2012) | 17.1°F (2013) | 7.90 in (1966) |
| December 7 | 70.0°F (2014) | 17.1°F (2013) | 3.43 in (1992) |
| December 8 | 70.0°F (1975) | 23.0°F (2011) | 1.16 in (2019) |
| December 9 | 72.0°F (1963) | 24.1°F (2013) | 0.88 in (2006) |
| December 10 | 77.0°F (1975) | 21.0°F (2013) | 2.96 in (1996) |
| December 11 | 70.0°F (2012) | 19.9°F (2013) | 3.79 in (1996) |
| December 12 | 70.0°F (2013) | 24.1°F (1963) | 2.95 in (2014) |
| December 13 | 70.0°F (1976) | 24.1°F (1963) | 2.95 in (1995) |
| December 14 | 66.9°F (1976) | 24.1°F (1976) | 5.10 in (2021) |
| December 15 | 70.0°F (2013) | 19.0°F (1975) | 1.43 in (2002) |
| December 16 | 70.0°F (2013) | 17.1°F (1975) | 2.45 in (1957) |
| December 17 | 75.9°F (2013) | 23.0°F (1975) | 2.90 in (2002) |
| December 18 | 79.0°F (2013) | 24.1°F (1975) | 2.26 in (1977) |
| December 19 | 69.1°F (2013) | 26.1°F (1975) | 5.72 in (2010) |
| December 20 | 66.0°F (1976) | 25.0°F (2012) | 2.10 in (2010) |
| December 21 | 70.0°F (2011) | 25.0°F (1976) | 2.27 in (2023) |
| December 22 | 69.1°F (2011) | 26.1°F (1976) | 3.90 in (1982) |
| December 23 | 69.1°F (2013) | 23.0°F (1976) | 3.28 in (1982) |
| December 24 | 73.9°F (2013) | 21.9°F (1976) | 5.41 in (1955) |
| December 25 | 75.0°F (2013) | 21.9°F (1976) | 3.46 in (2025) |
| December 26 | 79.0°F (2011) | 23.0°F (1976) | 1.35 in (1968) |
| December 27 | 78.1°F (2013) | 23.0°F (1976) | 1.94 in (1948) |
| December 28 | 77.0°F (2013) | 23.0°F (1976) | 3.82 in (1977) |
| December 29 | 73.9°F (2011) | 25.0°F (2011) | 2.28 in (1951) |
| December 30 | 75.0°F (2013) | 27.0°F (2013) | 3.14 in (1981) |
| December 31 | 75.0°F (2013) | 24.1°F (1975) | 6.24 in (2004) |