Average daily temperature during the week of 9 June 2025 - 15 June 2025 was 32 °C (90 °F), average minimal (night) temperature was 18 °C (64 °F). The current temperatures are above the long-term average for Viterbo, with the daily and nighttime temperatures being 27 °C (81 °F) and 15 °C (59 °F), respectively. The average temperatures during different times of day (local time) were following: 7am 20 °C (68 °F), 10am 26 °C (79 °F), 1pm 31 °C (88 °F), 4pm 32 °C (90 °F), 7pm 29 °C (84 °F), 10pm 22 °C (72 °F).

The week had 7 days without rain. During the whole week, total of 0 mm (0.00 in) of precipitation was observed, which is below the long term average for Viterbo, which is 5 mm (0.20 in). On average, the cloud coverage during daylight hours (from dawn to dusk) was 12 %. The meteorological event(s) that occurred were: mist and haze.

An average wind speed of 2.6 m/s was recorded. The atmosferic pressure ranged from 1014 hpa to 1020 hpa. The average air humidity was 66 % in Viterbo.

On average, there were 13.5 hours clear skies, 2 hours partially overcast skies and 1 hour overcast skies during the daytime (from dawn to dusk). The sunrise on average occurred at 05:34, and the sunset occurred at 20:48.

Weather overview

Nestled in the charming region of Viterbo, Italy, one can experience the gentle embrace of a temperate continental climate characterized by its soothing and moderate weather patterns. The days across seasons are painted with varying temperatures, with the mercury dipping to a comfortable 8 °C (47 °F) during the brisk month of January, and reaching a peak of a balmy 31 °C (87 °F) in the warmth of July. The skies over Viterbo part with rain most sparingly in July, when the earth feels only 4 days of rainfall, while the heavens open up most generously in November, bestowing 11 days of precipitation. As night cloaks the city, the warmth of summer nights is felt strongest in August, with temperatures reaching 18 °C (65 °F). Conversely, the chill of winter nights is at its coldest in January, with a mercury reading of 2 °C (36 °F).

January weather

During January in Viterbo, we witness the nadir of daytime temperatures averaging 8 °C (47 °F), and the nocturnal cold is also most pronounced with temperatures dropping to 2 °C (36 °F). The downward trend is observable in the frequency of rainy days and the volumetric rainfall also diminishes slightly compared to the preceding month, with observations at 31 mm (1.23 in). Moreover, the initial increment in the number of cloudless sunshine hours emerges, reaching 4 hours.

February weather

With the advent of February, a gradual ascent in daily temperatures can be noted in Viterbo, averaging at 10 °C (50 °F). Parallel to this, the succession of rainy days begins to increase, climbing to a count of 10 days. The elevation of cloud-free sunshine duration is also perceptible, as it extends to 4 hours.

March weather

As we transition into March, a decline in the number of rainy days in Viterbo can be observed, with the value recorded at 8 days. A steady climb in both daytime and nocturnal temperatures becomes evident, with the daytime temperature averaging 13 °C (56 °F) and nights warming to an average of 5 °C (41 °F). Cloud-free sunlight hours continue to rise, being recorded at 5 hours. Additionally, this month marks the peak period for wind speed.

April weather

As April unfolds, the ascent of day temperatures consistently follows suit, reaching an average of 17 °C (62 °F) in Viterbo, and the trend of rising night temperatures maintains it, ascending to 7 °C (45 °F). The count of rainy days starts to increase, noted at 9 days. The acceleration in the number of sunshine hours that penetrate the clouds persists, currently at 6 hours.

May weather

As May heralds the onset of the tourist season in Viterbo, the day temperatures continue their ascent, marked by an average of 22 °C (72 °F), and the evening warmth follows, registering an average of 12 °C (53 °F). Trends show a decrease in the number of rainy days, which begins its descent in May.

June weather

June, a prime month in Viterbo's tourist calendar, showcases a steady climb in the daytime temperature, noting a warm average of 27 °C (80 °F), while the mild night temperature also continues its previous pattern, observed at 15 °C (59 °F). A diminishing trail in the number of rainy days is seen, with a recorded value of 7 days, while the transition towards lighter rainfall begins to take shape in June.

July weather

July's stage is set with the zenith of daytime temperatures reaching an impressive average of 31 °C (87 °F). Concurrently, the month showcases a minimum in the count of rainy days, observed at 4 days, and a bottom line in rainfall amount, recorded at 13 mm (0.52 in). The arc of sunshine hours is at its apex as well, casting an average of 10 hours.

August weather

The apogee of the nighttime temperature can be discerned in August, with its readings at a mellow 18 °C (65 °F) in Viterbo. The peak of the tourist season meshes with an impending dry period, and an nascent increase in the number of rainy days is by now noticeable, stabilizing at 4 days. A gentle downward trend in the number of sunshine hours is perceptible from the previous peak.

September weather

As Viterbo welcomes September, a downturn in daytime temperatures sets in, complemented by a similar descent in evening coolness. Yet, the locale continues to offer favorable conditions for visits, with daytime warmth averaging at 25 °C (77 °F), and seas maintaining a perfect_temp23 °C (74 °F). The interval of rainy days expands slightly from the previous month, noted at 7 days, and an uptick in rainfall is also recorded, totalizing at 39 mm (1.55 in). The trend in declining sunlight hours harmonizes with the predecessor months.

October weather

October observes Viterbo's day temperatures persisting in their descent, settling at an autumnal 19 °C (67 °F), meanwhile, the night also witnesses a continued cool down. The accumulation of rainy days extends further, charted at 9 days. A receding coaxing of sunshine hours is in step with its April counterpart, spotting a length of 6 hours. The wind speed draws back to its annual low in this month.

November weather

The annual retreat in daytime warmth is clear in November, while the nightly chill in Viterbo ensues as well, its average recorded at 7 °C (44 °F). November stands as the month with the highest count of rainy days, reaching a climax at 11 days, and the maximum precipitation volume is also attained, amounting to 54 mm (2.15 in). The heftiest rise in humidity levels is manifest during this period.

December weather

The encroaching cold of December brings with it a reduction in both daytime and evening temperatures in Viterbo, with daily averages settling at 9 °C (49 °F) and the night growing colder still, dropping to an average of 4 °C (38 °F). A lessening in the frequency of rainy days sets a course towards the year's end, their number averaging at 10 days. Early signs of declining rainfall give way to a diminishing number of sunshine hours, its minimum noticeable in this month.

What are the daytime and night-time temperatures like in Viterbo during January?

In January, Viterbo experiences daytime temperatures averaging 8 °C (47 °F) and nocturnal lows around 2 °C (36 °F)

Does February in Viterbo signal a transition towards drier conditions?

Not quite, February in Viterbo is characterized by incrementing rainy days, with an average of 10 days expected.

How does the wind speed in March compare to other months in Viterbo?

March presents the pinnacle of wind velocity throughout the year in Viterbo.

What can be said about the progression of sunshine hours during April in Viterbo?

April in Viterbo offers an enriching increase in sunlight hours, with typically 6 hours of clear skies.

Is May a considerably dry month in Viterbo, suitable for outdoor activities?

Indeed, May sees a lesser frequency of rain, with Viterbo enjoying approximately 8 days of precipitation, making it favorable for outdoor pursuits.

What is the likelihood of encountering rain during my visit to Viterbo in June?

Rainfall in June is relatively infrequent in Viterbo, with the region expecting about 7 days with rain.

How do maximum daytime temperatures and sunshine duration enhance the charm of Viterbo in July?

The fusion of maximum daily temperatures averaging 31 °C (87 °F) with prolonged sunshine hours averaging 10 hours amplifies Viterbo's allure in July.

How does the nighttime warmth in August contribute to the overall experience in Viterbo?

August in Viterbo is notable for its pleasant nocturnal temperatures averaging 18 °C (65 °F), complementing the vibrant tourist season.

With the arrival of September, what weather pattern shifts can be expected in Viterbo?

The month of September in Viterbo ushers in a gradual reduction in temperatures and a small increase in rainfall frequency, retaining however overall pleasant weather suitable for various activities.

Is there a noticeable reduction in wind speed during October in Viterbo, and how does that affect the climate?

Indeed, October marks a notable decrease in windiness in Viterbo, with a calmer atmosphere contributing to a milder climate experience.

Does November bring about a notable change in Viterbo's weather pattern, particularly in terms of humidity?

Without a doubt, a salient shift in weather occurs in November, distinguished by heightened levels of humidity and the peak incidence of rainfall.

What can visitors expect from the sunshine hours and overall atmosphere in Viterbo during the month of December?

December in Viterbo is characterized by the fewest sunshine hours throughout the year, contributing to a more reserved and tranquil atmosphere.