Viterbo in september: average Weather, Temperature and Climate
Weather in Viterbo in september 2025
The weather in Viterbo in september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 6
Weather at 6am
65°F
Clear/Sunny
57% of time
22%
9%
8%
Weather at 12pm
79°F
Clear/Sunny
55% of time
26%
12%
6%
Weather at 6pm
68°F
Clear/Sunny
55% of time
22%
15%
8%
Weather at 3am
63°F
54%
18%
14%
7%
Evolution of daily average temperature and precipitation in Viterbo in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Viterbo in september.
The climate of Viterbo in september is good
The weather in september in Viterbo is relatively dry (with 4.2in of precipitation over 6 days). The situation is deteriorating compared to the previous month since in august there is an average of 1.9in of precipitation over 3 days.
The climate enjoyable around this city this month. The thermometer averaged maximum of 81°F. The minimum is 65°F. Thus, the mean temperature average on this month of september in Viterbo is 72°F. Note that these seasonal averages are in contrast with those observed in Viterbo in the month of september with a maximum record of 94°F in 2018 and a minimum record of 49°F in 2020.
On this month of september, day length in Viterbo is generally 12:29. The sun rises at 05:52 and sunset is at 18:21.
With a good climate, september is advisable to go in Viterbo.
Seasonal average climate and temperature of Viterbo in september
Check below seasonal norms These datas are set from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 72°F | ||||
| Highest temperature | 81°F | ||||
| Lowest temperature | 65°F | ||||
| Highest record temperature | 94°F (2018) | ||||
| Lowest record temperature | 49°F (2020) | ||||
| Number of days at +86°F | 6 day(s) (20%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 15km/h | ||||
| Wind temperature | 65°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.2in | ||||
| Number of days with rainfall | 6 day(s) (18%) | ||||
| Record daily rainfall | 3.3in (2009) | ||||
| Other climate data | |||||
| Humidity | 79% | ||||
| Visibility | 9.47km | ||||
| Cloud cover | 22% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:52 | ||||
| Time of sunset | 18:21 | ||||
| Length of day | 12:29 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Viterbo in september 2024:
70°F to 95°F
70°F to 88°F
65°F to 88°F
65°F to 88°F
67°F to 76°F
65°F to 83°F
63°F to 86°F
68°F to 86°F
67°F to 79°F
61°F to 83°F
61°F to 81°F
67°F to 74°F
56°F to 68°F
49°F to 70°F
52°F to 74°F
56°F to 67°F
56°F to 67°F
56°F to 70°F
56°F to 70°F
54°F to 74°F
56°F to 77°F
58°F to 77°F
58°F to 74°F
59°F to 76°F
58°F to 72°F
59°F to 77°F
65°F to 79°F
65°F to 72°F
52°F to 68°F
49°F to 72°F
Map: other cities in Italy in september
Cities near Viterbo:
| Pitigliano in september | perfect weather |
| Civitavecchia in september | good weather |
| Terni in september | perfect weather |
| Vatican in september | good weather |
| Sarteano in september | perfect weather |
| Rome in september | good weather |
| Umbria in september | perfect weather |
| Chianciano Terme in september | perfect weather |
| Lido di Ostia in september | good weather |
| Perugia in september | perfect weather |
| Assisi in september | perfect weather |
| Grosseto in september | good weather |
Click over cities on the map for information about the weather in september.
Viterbo
perfect weather
good
tolerable
bad
very bad
Weather data for Viterbo in september:
Weather data for Viterbo for september are derived from an average of the weather forecast since 2009 in Viterbo. There is a margin of error and these forecasts are to be considered as general information only. The weather in Viterbo can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Viterbo.