The weather in Jaca in January is very cold with temperatures between -2°C and 5°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Jaca 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.
Let it snow! You can expect Jaca to be covered in white during the month of January. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Jaca in January 2026.
If you’re planning to visit Jaca in the near future, we highly recommend that you review the 14 day weather forecast for Jaca before you arrive.
Temperatures
5° / -2°
Rainy Days
7
Snowy Days
16
Dry Days
10
Rainfall
191
mm
Sun Hours
10.2
Hrs
