December weather in San Fernando, CA
The average temperature in San Fernando in December is °F (°F–°F). Average precipitation: 2.68 inches.
December is a winter month in San Fernando, and is cooler than the annual average of 0°F. Expect about 6 days with precipitation. Daylight averages about 9h 43m.
Avg High
°F
Avg Low
°F
Precipitation
2.68 in
Daylight
9h 43m
December records in San Fernando
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 77.0°F (2025) | 41.0°F (1967) | 0.84 in (1997) |
| December 2 | 73.9°F (2025) | 42.1°F (2023) | 1.85 in (1961) |
| December 3 | 72.0°F (2023) | 39.9°F (2023) | 2.96 in (1966) |
| December 4 | 73.9°F (2023) | 42.1°F (2023) | 1.82 in (1974) |
| December 5 | 81.0°F (2023) | 46.9°F (1967) | 1.77 in (1966) |
| December 6 | 82.9°F (2023) | 46.0°F (1967) | 3.24 in (1997) |
| December 7 | 80.1°F (2024) | 45.0°F (1967) | 1.97 in (1992) |
| December 8 | 81.0°F (2025) | 46.0°F (1967) | 0.93 in (1949) |
| December 9 | 81.0°F (2025) | 43.0°F (2024) | 0.37 in (2019) |
| December 10 | 82.9°F (2024) | 41.0°F (2024) | 1.48 in (1996) |
| December 11 | 84.0°F (2025) | 48.0°F (2024) | 1.36 in (1996) |
| December 12 | 87.1°F (2025) | 44.1°F (1967) | 1.82 in (1951) |
| December 13 | 82.0°F (2025) | 35.1°F (1967) | 0.75 in (1975) |
| December 14 | 75.0°F (2023) | 33.1°F (1967) | 0.75 in (2021) |
| December 15 | 75.0°F (2023) | 36.0°F (1967) | 1.63 in (1957) |
| December 16 | 82.0°F (2025) | 39.0°F (1967) | 2.74 in (1988) |
| December 17 | 87.1°F (2024) | 39.9°F (1967) | 1.23 in (1957) |
| December 18 | 82.0°F (2024) | 43.0°F (1967) | 1.98 in (1949) |
| December 19 | 82.9°F (2024) | 39.9°F (1967) | 3.03 in (1970) |
| December 20 | 84.0°F (2025) | 33.1°F (1967) | 1.95 in (2010) |
| December 21 | 86.0°F (2025) | 36.0°F (1967) | 1.63 in (1970) |
| December 22 | 79.0°F (2024) | 44.1°F (1967) | 1.28 in (2023) |
| December 23 | 77.0°F (2025) | 48.9°F (2023) | 1.43 in (1996) |
| December 24 | 75.0°F (1967) | 46.9°F (2023) | 2.78 in (2021) |
| December 25 | 78.1°F (1967) | 46.9°F (2024) | 3.30 in (2025) |
| December 26 | 80.1°F (1967) | 46.0°F (2023) | 2.20 in (2019) |
| December 27 | 75.9°F (1967) | 45.0°F (2024) | 2.53 in (2025) |
| December 28 | 77.0°F (1967) | 45.0°F (2023) | 2.01 in (1977) |
| December 29 | 72.0°F (2024) | 43.0°F (2023) | 3.43 in (1965) |
| December 30 | 69.1°F (2023) | 44.1°F (2024) | 2.34 in (2021) |
| December 31 | 69.1°F (2025) | 43.0°F (2024) | 1.57 in (2021) |