The temperatures in San Jose in January are comfortable with low of 57°F and and high up to 73°F.
You can expect about 3 to 8 days of rain in San Jose during the month of January. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in San Jose in January 2026.
If you’re planning to visit San Jose in the near future, we highly recommend that you review the 14 day weather forecast for San Jose before you arrive.
Temperatures
73° / 57°
Rainy Days
4
Snowy Days
0
Dry Days
27
Rainfall
3.62
in
Sun Hours
11.0
Hrs
