December weather in Oceanside, CA
The average temperature in Oceanside in December is 52.9°F (39.8°F–66.1°F). Average precipitation: 1.98 inches.
December is a winter month in Oceanside, and is cooler than the annual average of 61°F. Daily temperatures swing about 26.3°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 49m. For travel, December is a comfortable month to visit.
Avg High
66.1°F
Avg Low
39.8°F
Precipitation
1.98 in
Daylight
9h 49m
December records in Oceanside
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 77.0°F (2013) | 28.9°F (2004) | 0.08 in (2007) |
| December 2 | 78.1°F (2006) | 32.0°F (2020) | 0.55 in (2014) |
| December 3 | 80.1°F (2006) | 29.1°F (2020) | 0.53 in (2014) |
| December 4 | 75.9°F (2000) | 29.1°F (2011) | 1.05 in (2019) |
| December 5 | 80.1°F (2023) | 28.9°F (1999) | 0.53 in (2018) |
| December 6 | 77.0°F (2017) | 26.2°F (2011) | 1.97 in (2018) |
| December 7 | 86.0°F (2001) | 30.0°F (1999) | 0.97 in (2009) |
| December 8 | 84.9°F (2020) | 29.1°F (2011) | 0.36 in (2007) |
| December 9 | 84.9°F (2017) | 30.2°F (2011) | 0.67 in (2001) |
| December 10 | 87.1°F (2017) | 28.2°F (2024) | 0.10 in (1999) |
| December 11 | 81.0°F (2017) | 30.9°F (1999) | 0.64 in (2022) |
| December 12 | 82.9°F (2010) | 29.1°F (2024) | 1.14 in (2014) |
| December 13 | 81.0°F (2010) | 28.9°F (1999) | 0.83 in (2012) |
| December 14 | 73.9°F (2013) | 29.1°F (2013) | 1.29 in (2021) |
| December 15 | 79.0°F (2017) | 33.1°F (2015) | 1.38 in (2008) |
| December 16 | 84.0°F (2013) | 29.1°F (2015) | 0.72 in (2016) |
| December 17 | 77.0°F (2004) | 31.1°F (2019) | 1.03 in (2008) |
| December 18 | 82.9°F (2000) | 30.2°F (2019) | 0.30 in (2012) |
| December 19 | 82.0°F (2009) | 31.1°F (2006) | 1.03 in (2010) |
| December 20 | 75.9°F (2020) | 30.2°F (2012) | 0.83 in (2002) |
| December 21 | 80.1°F (2005) | 29.1°F (2012) | 2.97 in (2010) |
| December 22 | 75.9°F (1999) | 28.2°F (2017) | 1.30 in (2010) |
| December 23 | 77.0°F (2014) | 25.2°F (2011) | 0.90 in (2019) |
| December 24 | 80.1°F (1999) | 30.2°F (2011) | 0.85 in (2016) |
| December 25 | 82.9°F (2013) | 28.2°F (2011) | 0.51 in (2003) |
| December 26 | 82.0°F (2013) | 30.9°F (2000) | 1.28 in (2019) |
| December 27 | 77.0°F (2013) | 26.2°F (2015) | 0.33 in (2022) |
| December 28 | 73.9°F (1999) | 28.2°F (2011) | 1.12 in (2004) |
| December 29 | 82.9°F (2016) | 28.9°F (2000) | 0.99 in (2004) |
| December 30 | 75.0°F (2013) | 30.0°F (1999) | 0.71 in (2014) |
| December 31 | 73.9°F (2019) | 30.0°F (2003) | 0.72 in (2004) |