San Diego weather in January
January in San Diego averages 66°F by day and 49°F at night, with 1.7 inches of precipitation. It is the 10th-warmest and 2nd-wettest month of the year here.
- Average high
- 66°F+1° vs December
- Average low
- 49°F0 nights below freezing
- Precipitation
- 1.7 in4 days with 0.1 in. or more
- Snow
- 0.0 in0 days at 90°F+
Is January a good time to visit San Diego?
Yes. January is one of the most comfortable months in San Diego by our rule (highs of 62 to 86°F, lows of 42°F or more and under 4.5 inches of precipitation). The most comfortable months overall are January to December.
Get outside in San Diego in January
January is made for being outside. Try San Diego Zoo, SeaWorld San Diego, Balboa Park, Cabrillo National Monument. All things to do in San Diego.
On January 15 the sun rises at 6:51 am and sets at 5:05 pm, giving 10h 14m of daylight. Daylight all year.
What to pack for San Diego in January
- T-shirts and a light jacket or sweater
Based on 30-year averages, not a forecast. Check the forecast a few days before you go.
January nearby
| City | Distance | High | Low | Precip. |
|---|---|---|---|---|
| San Diego | 66°F | 49°F | 1.7 in | |
| Chula Vista, CA | 8 mi | 66°F | 49°F | 1.7 in |
| El Cajon, CA | 15 mi | 69°F | 43°F | 2.3 in |
| Escondido, CA | 28 mi | 69°F | 45°F | 3.2 in |
| San Marcos, CA | 30 mi | 65°F | 48°F | 2.5 in |
| Carlsbad, CA | 32 mi | 65°F | 48°F | 2.5 in |
| Vista, CA | 34 mi | 65°F | 48°F | 2.5 in |
Frequently asked questions
What is the weather like in San Diego in January?
In January, San Diego averages a high of 66°F and a low of 49°F, with 1.7 inches of precipitation (NOAA 1991-2020 normals).
Is January a good time to visit San Diego?
Yes. January is one of San Diego's most comfortable months by our rule: highs between 62°F and 86°F, lows of 42°F or more and modest rain.
Does it snow in San Diego in January?
Rarely. The January snowfall normal is under half an inch.
Before and after: San Diego in December and San Diego in February. All twelve months: San Diego weather by month.
NOAA NCEI 1991-2020 climate normals, station North Island NAS, CA, 2.7 miles from the city center.