The temperatures in Viterbo in December are quite cold with temperatures between 5°C and 11°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Viterbo during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Viterbo can expect a few days of snow in December.
Our weather forecast can give you a great sense of what weather to expect in Viterbo in December 2025.
If you’re planning to visit Viterbo in the near future, we highly recommend that you review the 14 day weather forecast for Viterbo before you arrive.
Temperatures
11° / 5°
Rainy Days
6
Snowy Days
1
Dry Days
25
Rainfall
91
mm
Sun Hours
9.4
Hrs
