January weather in Oceanside, CA
The average temperature in Oceanside in January is 53.6°F (40.5°F–66.7°F). Average precipitation: 2.37 inches.
January is a winter month in Oceanside, and is cooler than the annual average of 61°F. Daily temperatures swing about 26.2°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 10h 2m. For travel, January is a comfortable month to visit.
Avg High
66.7°F
Avg Low
40.5°F
Precipitation
2.37 in
Daylight
10h 2m
January records in Oceanside
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 79.0°F (2008) | 29.1°F (2015) | 0.66 in (2026) |
| January 2 | 78.1°F (2003) | 30.0°F (2001) | 0.47 in (2006) |
| January 3 | 82.9°F (2001) | 28.2°F (2013) | 1.06 in (2005) |
| January 4 | 81.0°F (2012) | 27.1°F (2019) | 0.63 in (2026) |
| January 5 | 84.9°F (2006) | 28.2°F (2013) | 1.02 in (2008) |
| January 6 | 88.0°F (2006) | 32.0°F (2000) | 1.49 in (2008) |
| January 7 | 82.9°F (2003) | 28.0°F (2000) | 0.80 in (2005) |
| January 8 | 78.1°F (2007) | 26.1°F (2000) | 0.25 in (2018) |
| January 9 | 82.9°F (2007) | 28.9°F (2000) | 2.36 in (2018) |
| January 10 | 79.0°F (2009) | 29.1°F (2025) | 0.60 in (2023) |
| January 11 | 82.0°F (2022) | 29.1°F (2013) | 0.81 in (2005) |
| January 12 | 89.1°F (2009) | 27.1°F (2013) | 0.53 in (2017) |
| January 13 | 86.0°F (2018) | 29.1°F (2013) | 0.14 in (2017) |
| January 14 | 84.9°F (2014) | 27.1°F (2007) | 1.83 in (2023) |
| January 15 | 91.9°F (2021) | 25.2°F (2007) | 0.84 in (2023) |
| January 16 | 84.9°F (2014) | 28.2°F (2007) | 0.86 in (2023) |
| January 17 | 87.1°F (2014) | 28.2°F (2007) | 0.36 in (2019) |
| January 18 | 84.9°F (2009) | 30.9°F (2001) | 1.38 in (2010) |
| January 19 | 87.1°F (2005) | 31.1°F (2012) | 0.52 in (2017) |
| January 20 | 79.0°F (2013) | 32.0°F (2008) | 1.11 in (2017) |
| January 21 | 73.9°F (2009) | 31.1°F (2006) | 1.22 in (2010) |
| January 22 | 80.1°F (2013) | 29.1°F (2007) | 1.95 in (2024) |
| January 23 | 80.1°F (2025) | 29.1°F (2025) | 0.59 in (2017) |
| January 24 | 82.9°F (2015) | 30.0°F (2002) | 0.09 in (2013) |
| January 25 | 81.0°F (2003) | 31.1°F (2025) | 0.49 in (2013) |
| January 26 | 84.0°F (2003) | 33.1°F (2002) | 0.76 in (2001) |
| January 27 | 82.0°F (2012) | 33.1°F (2023) | 1.05 in (2008) |
| January 28 | 90.0°F (2018) | 32.0°F (2022) | 0.16 in (2002) |
| January 29 | 87.1°F (2018) | 33.1°F (2002) | 1.11 in (2021) |
| January 30 | 79.0°F (2026) | 30.0°F (2002) | 0.99 in (2007) |
| January 31 | 87.1°F (2003) | 28.0°F (2002) | 0.83 in (2019) |