San Jose · January
Run in the morning.
Cool month: average high 60°F, low 44°F. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
60° / 44°F
Humidity
75%
Rain days
10/mo
Wind
8 mph
What January feels like in San Jose
Sunrise
08:19
Mid-month average
Sunset
18:14
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 Jose in January
The kit for January in San Jose: a long-sleeve or light jacket for the first mile.
January vs the surrounding months
vs December
+2° avg high
-2 rain days
San Jose in December →
January
60°F avg high
10 rain days
Best: morning
vs February
-2° avg high
+2 rain days
San Jose in February →
Frequently Asked Questions
What is the best time of day to run in San Jose in January?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in San Jose in January?+
Average high 60°F, average low 44°F.
How does January compare to surrounding months in San Jose?+
Compared to December (avg high 58°F), January is warmer. Compared to February (avg high 62°F), January is cooler.
Does it rain often in San Jose in January?+
Expect about 10 measurable rain days in January, on average.