San Francisco · January
Run in the morning.
Cool month: average high 57°F, low 46°F. Humidity averages 81% — the limiting factor on most runs. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
57° / 46°F
Humidity
81%
Rain days
11/mo
Wind
13 mph
What January feels like in San Francisco
Sunrise
08:22
Mid-month average
Sunset
18:15
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 Francisco in January
The kit for January in San Francisco: a long-sleeve or light jacket for the first mile.
January vs the surrounding months
vs December
+1° avg high
-2 rain days
San Francisco in December →
January
57°F avg high
11 rain days
Best: morning
vs February
-1° avg high
+3 rain days
San Francisco in February →
Frequently Asked Questions
What is the best time of day to run in San Francisco in January?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in San Francisco in January?+
Average high 57°F, average low 46°F.
How does January compare to surrounding months in San Francisco?+
Compared to December (avg high 56°F), January is warmer. Compared to February (avg high 59°F), January is cooler.
Does it rain often in San Francisco in January?+
Expect about 11 measurable rain days in January, on average.