December weather in San Diego, CA
The average temperature in San Diego in December is 56.3°F (45.3°F–67.3°F). Average precipitation: 1.61 inches.
December is a winter month in San Diego, and is cooler than the annual average of 64.1°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 51m. For travel, December is a comfortable month to visit.
Avg High
67.3°F
Avg Low
45.3°F
Precipitation
1.61 in
Daylight
9h 51m
December records in San Diego
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 90.0°F (1998) | 35.1°F (2004) | 0.19 in (1998) |
| December 2 | 81.0°F (2006) | 37.0°F (2004) | 0.49 in (2014) |
| December 3 | 79.0°F (2015) | 37.9°F (2004) | 0.30 in (2014) |
| December 4 | 78.1°F (2000) | 37.9°F (1999) | 0.75 in (2019) |
| December 5 | 81.0°F (2023) | 37.9°F (2005) | 0.69 in (2018) |
| December 6 | 79.0°F (2015) | 36.0°F (2011) | 1.71 in (2018) |
| December 7 | 82.9°F (2001) | 34.0°F (1998) | 2.00 in (2009) |
| December 8 | 84.9°F (2017) | 37.0°F (1998) | 0.64 in (2007) |
| December 9 | 84.9°F (2017) | 37.0°F (1998) | 0.26 in (2021) |
| December 10 | 82.9°F (2017) | 39.0°F (2013) | 0.17 in (2006) |
| December 11 | 84.9°F (2017) | 36.0°F (1999) | 0.68 in (2022) |
| December 12 | 86.0°F (2010) | 39.0°F (1998) | 0.42 in (2011) |
| December 13 | 84.0°F (2010) | 39.0°F (1999) | 1.47 in (2012) |
| December 14 | 80.1°F (2017) | 37.9°F (2007) | 1.14 in (2021) |
| December 15 | 82.0°F (2017) | 37.9°F (1999) | 1.28 in (2008) |
| December 16 | 84.0°F (2013) | 36.0°F (2001) | 1.39 in (2016) |
| December 17 | 78.1°F (1999) | 37.9°F (2001) | 1.70 in (2008) |
| December 18 | 81.0°F (2000) | 37.0°F (2016) | 0.48 in (2012) |
| December 19 | 80.1°F (2004) | 36.0°F (2006) | 0.25 in (2010) |
| December 20 | 80.1°F (2020) | 37.0°F (2006) | 0.72 in (2010) |
| December 21 | 82.9°F (2005) | 37.0°F (1998) | 2.06 in (2010) |
| December 22 | 77.0°F (2014) | 36.0°F (1998) | 2.17 in (2010) |
| December 23 | 82.0°F (2014) | 34.0°F (2011) | 1.18 in (2019) |
| December 24 | 77.0°F (1999) | 32.0°F (1998) | 0.85 in (2016) |
| December 25 | 82.0°F (2022) | 35.1°F (1998) | 0.60 in (2003) |
| December 26 | 82.9°F (2022) | 39.0°F (2001) | 1.19 in (2019) |
| December 27 | 81.0°F (2017) | 35.1°F (2015) | 0.19 in (2021) |
| December 28 | 84.9°F (2017) | 34.0°F (2003) | 0.99 in (2004) |
| December 29 | 84.0°F (2017) | 37.9°F (2003) | 0.49 in (2010) |
| December 30 | 81.0°F (2017) | 37.9°F (2020) | 0.32 in (2016) |
| December 31 | 73.0°F (2011) | 36.0°F (2010) | 0.75 in (2016) |