The highest day temperature in January 2025 was 59°F. The lowest night temperature was 27°F. The average values for day and night temperatures during January were 50.9°F и 42.4°F respectivly.

You can expect various weather conditions during January. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in January for Viterbo is 0.9 in.

The average wind speed in January is 6.2 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Viterbo in January is 5.3 hours.