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Monthly climate in Viterbo, Lazio, Italy

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Viterbo features a humid subtropical climate (Cfa).Temperatures typically range between 6 °C (43 °F) and 25 °C (78 °F) through the year, but rarely can drop to -8 °C (19 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 903 mm (35.6 inches) and receives 108 rainy days on the 1 mm (0.04 inches) threshold annually.Viterbo enjoys an average of 3921 hours of sunshine throughout the year, and daylight varies from 9 hours 6 minutes to 15 hours 13 minutes per day.

Monthly average temperatures in Viterbo, Lazio, Italy §

The warmest months in Viterbo are June, July and August, with daily mean temperatures ranging from 22 to 25 °C (72 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 8 °C (43 - 47 °F) throughout the day. On average each year, Viterbo experiences 94 days above 25 °C (77.0 °F) and 6 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Viterbo, Lazio, Italy.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 17°C
(63°F)		 19°C
(67°F)		 23°C
(73°F)		 26°C
(79°F)		 32°C
(90°F)		 35°C
(96°F)		 35°C
(96°F)		 38°C
(101°F)		 31°C
(88°F)		 27°C
(81°F)		 20°C
(69°F)		 17°C
(62°F)
Mean maximum 14°C
(58°F)		 17°C
(62°F)		 20°C
(68°F)		 23°C
(74°F)		 27°C
(81°F)		 31°C
(88°F)		 34°C
(94°F)		 36°C
(98°F)		 31°C
(87°F)		 25°C
(77°F)		 19°C
(67°F)		 16°C
(60°F)
Average high 10°C
(50°F)		 12°C
(55°F)		 14°C
(58°F)		 18°C
(64°F)		 22°C
(71°F)		 28°C
(82°F)		 30°C
(87°F)		 31°C
(89°F)		 26°C
(79°F)		 21°C
(69°F)		 15°C
(60°F)		 11°C
(53°F)
Daily mean 6°C
(43°F)		 8°C
(47°F)		 10°C
(49°F)		 13°C
(55°F)		 17°C
(63°F)		 22°C
(72°F)		 25°C
(77°F)		 25°C
(78°F)		 21°C
(69°F)		 16°C
(61°F)		 12°C
(54°F)		 8°C
(47°F)
Average low 3°C
(38°F)		 5°C
(41°F)		 5°C
(42°F)		 8°C
(47°F)		 13°C
(55°F)		 17°C
(63°F)		 19°C
(67°F)		 20°C
(68°F)		 16°C
(62°F)		 12°C
(54°F)		 9°C
(49°F)		 5°C
(41°F)
Mean minimum -1°C
(31°F)		 -1°C
(31°F)		 -0°C
(32°F)		 2°C
(36°F)		 8°C
(47°F)		 13°C
(56°F)		 16°C
(62°F)		 16°C
(61°F)		 11°C
(52°F)		 8°C
(47°F)		 3°C
(38°F)		 0°C
(33°F)
Minimum -4°C
(25°F)		 -6°C
(21°F)		 -8°C
(19°F)		 -0°C
(32°F)		 6°C
(42°F)		 11°C
(52°F)		 15°C
(60°F)		 14°C
(58°F)		 9°C
(48°F)		 7°C
(45°F)		 0°C
(33°F)		 -3°C
(27°F)

Compare climate in Viterbo with other places

Compare temperature, precipitation, sunshine, UV index in Viterbo, Lazio, Italy with other places around the world.

Monthly average precipitation in Viterbo, Lazio, Italy §

Viterbo usually has the most precipitation in September, November and December, with an average of 12 rainy days and 119 mm (4.7 inches) of precipitation per month.The driest months in Viterbo are June, July and August. On average, 33 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Viterbo, Lazio, Italy.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 56 (2.2) 70 (2.7) 75 (2.9) 74 (2.9) 81 (3.2) 35 (1.4) 32 (1.3) 30 (1.2) 92 (3.6) 92 (3.6) 155 (6.1) 110 (4.3)
Average precipitation days (≥ 1 mm) 7 8 10 10 12 5 4 7 9 9 15 12

Monthly sunshine hours in Viterbo, Lazio, Italy §

The sunniest months in Viterbo are May, June and July, when the sun shines an average of 13 hours 36 minutes a day.Least sunny months in Viterbo: January, November and December receive an average of 7 hours 27 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Viterbo, Lazio, Italy.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 198 254 322 353 400 419 432 399 338 314 246 240
Mean daily daylight hours 9h 26m 10h 33m 11h 57m 13h 23m 14h 37m 15h 13m 14h 54m 13h 49m 12h 26m 11h 0m 9h 45m 9h 6m

Solar UV radiation in Viterbo, Lazio, Italy §

Viterbo experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Viterbo UV Index data.

Average daily maximum UV levels by month for Viterbo, Lazio, Italy.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 4 5 7 8 10 10 9 7 5 3 2