The climate in Viterbo follows the four seasons of the northern hemisphere, but temperatures can vary considerably during the year. July and August are usually the hottest months, with an average high temperature of 30 °C which dramatically drops to 10 °C in January.
July is usually the driest month, whereas if you come in November you may just as well pack your umbrella as chances are that you might get some serious rainy days.
Spring and Autumn offer the most pleasant temperatures, ranging between 15 and 20 °C. Then again, every season, every month adds a little magic to Viterbo: different activities, glorious sunsets and seasonal menus are all there to be enjoyed throughout the year.