Weather · San Diego, United States
San Diego Weather in January
January in San Diego averages 21°C by day and 10°C at night, with about 32mm of rain. That makes it one of the best months to visit.
Avg high
21°C
70°F
Avg low
10°C
50°F
Rainfall
32mm
#10 wettest of 12
What to pack
Layers, plus a jacket for mornings and nights. Rain is unlikely to interrupt your plans.
Timing a trip around the weather? A Local Friend in San Diego builds it around the season for you.