Viterbo Weather & Climate: Best Time to Visit

Monthly Temperature in Viterbo

Depending on the time of the year, temperatures range from very warm to chilly in Viterbo. Average daytime temperatures reach a very warm 31°C (88°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 11°C (52°F).

At night, temperatures range from around 19°C (66°F) in August to 3°C (37°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rainfall in Viterbo

Viterbo has a relatively rainy climate with high precipitation levels, averaging 1006 mm (40 in) of rainfall annually. Viterbo can be quite wet during November, receiving approximately 144 mm (5.7 in) of precipitation over 15 rainy days.

In contrast, during the driest month (July), you will experience much drier conditions, with 33 mm (1.3 in) of precipitation spread across 6 rainy days days. For more details, please visit our Viterbo Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Sunshine Hours in Viterbo

Viterbo can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 11.1 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 3.7 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Humidity in Viterbo by Month

The relative humidity is high throughout the year in Viterbo.

The city experiences its highest humidity in November, reaching 77%. In July, the humidity drops to its lowest level at 72%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year