Average annual temperature is 15.0 °C
Absolute maximum temperature: 37.6 °C
Absolute minimum temperature: -2.8 °C
Number of sunny days: 180 days
Number of rainy days: 184 days
Number of snow days: 1 day
Look at detailed online map of Viterbo
* Weather data for Viterbo Italy is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 15.6 | 17.3 | 19.1 | 21.0 | 26.2 | 34.2 | 37.6 | 37.4 | 30.8 | 30.0 | 20.2 | 18.2 |
| Average daytime temperature (°C) | 10.3 | 11.6 | 14.7 | 16.4 | 21.1 | 26.4 | 32.3 | 31.2 | 27.4 | 24.3 | 15.5 | 12.6 |
| Average temperature (°C) | 6.2 | 6.1 | 10.0 | 11.0 | 16.0 | 20.9 | 25.7 | 24.3 | 21.0 | 18.7 | 11.5 | 8.3 |
| Average night temperature (°C) | 2.9 | 1.8 | 5.9 | 6.2 | 11.5 | 15.9 | 19.6 | 18.4 | 15.9 | 14.4 | 7.4 | 4.6 |
| Absolute minimum temperature (°C) | -2.7 | -2.8 | 1.2 | 0.7 | 7.9 | 12.6 | 16.0 | 13.8 | 11.4 | 11.1 | 0.4 | -0.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.8 | 8.0 | 8.7 | 10.7 | 9.5 | 12.7 | 13.4 | 12.4 | 10.5 | 8.6 | 6.5 | 6.3 |
| Precipitation (mm) | 84 | 37 | 72 | 95 | 157 | 121 | 17 | 59 | 44 | 65 | 89 | 30 |
| Sunny days | 11 | 20 | 17 | 11 | 6 | 9 | 21 | 20 | 20 | 16 | 10 | 19 |
| Rainy days | 19 | 8 | 14 | 19 | 25 | 21 | 10 | 11 | 10 | 15 | 20 | 12 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Viterbo during the most sunny months:
The largest precipitation sum in Viterbo is at