San Diego · January
Run in the morning.
Cool month: average high 64°F, low 48°F. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
64° / 48°F
Humidity
72%
Rain days
7/mo
Wind
10 mph
What January feels like in San Diego
Sunrise
07:49
Mid-month average
Sunset
18:06
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in San Diego in January
The kit for January in San Diego: a long-sleeve or light jacket for the first mile.
January vs the surrounding months
vs December
0° avg high
-1 rain days
San Diego in December →
January
64°F avg high
7 rain days
Best: morning
vs February
-1° avg high
0 rain days
San Diego in February →
Frequently Asked Questions
What is the best time of day to run in San Diego in January?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in San Diego in January?+
Average high 64°F, average low 48°F.
How does January compare to surrounding months in San Diego?+
Compared to December (avg high 64°F), January is cooler. Compared to February (avg high 65°F), January is cooler.
Does it rain often in San Diego in January?+
Expect about 7 measurable rain days in January, on average.