Viterbo weather in August

In August, Viterbo sees average daytime highs of 30°C and overnight lows near 19°C, with 33 mm of rain across 6 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 28°C by the end. The sky is clear or mostly clear about 72% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 18 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Viterbo's 2nd-clearest and 12th-windiest month. For the whole year in context, see Viterbo's year-round climate.

Daytime high
30°
1st warmest
Overnight low
19°
12th coldest
Rainfall
33 mm
6 wet days
Daylight
13 h 42 min
5:24 AM – 7:08 PM
Cloud cover
27%
2nd clearest
Wind
8 km/h
12th windiest
Solar energy
6.18 kWh/m²
Travel score
6.1
out of 10
Air quality
Moderate
PM2.5 11.3 µg/m³ · 2019

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 28°C by the end.

A typical August day in Viterbo reaches about 30°C in the afternoon and slips back to 19°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 33°C. Set against its neighbours, August runs on par with July and about 5°C warmer than September.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13019
23019
33020
43020
53019
63019
73019
83019
93019
103019
113019
123019
133019
143019
153019
163019
173019
183019
193019
203019
213019
222919
232919
242918
252918
262918
272918
282818
292818
302818
312817

How August really feels in Viterbo

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Viterbo weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 618.20.59.32.2
Feb11° / 688.70.810.32.8
Mar14° / 749.20.511.64.3
Apr17° / 7611.10.113.15.5
May22° / 12°639.4014.46.9
Jun26° / 16°4670157.4
Jul30° / 19°284.8014.86.4
Aug30° / 19°336013.76.1
Sep25° / 16°849.1012.37.1
Oct20° / 12°11410.6010.86.4
Nov14° / 12712.10.19.64.1
Dec11° / 8610.10.492.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 72% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 13%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18812
28812
38812
48812
58911
68911
78911
88911
98911
108911
118911
128911
138911
148911
158911
168911
178911
188911
198812
208812
218713
228713
238713
248614
258515
268515
278515
288317
298317
308218
318119

Chance of precipitation in August

Any precipitation

Viterbo gets around 33 mm of rain over 6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 26% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
117
217
317
417
517
617
717
817
917
1017
1117
1217
1317
1417
1517
1618
1718
1818
1919
2019
2120
2221
2321
2422
2523
2624
2724
2825
2925
3026
3126

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the humid band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 26% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
17224426
27224327
37234327
47234227
57234227
68234127
78234128
88234128
98244128
108244128
117244127
127244127
137244227
147244227
157244227
166244326
176244326
186244426
196244426
206244427
216244327
226244327
237244227
248244126
259254026
2610253926
2711263825
2812263724
2913273623
3015283522
3116283521

Wind in August

Winds average 8 km/h in August, the calmest month.

Across August, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 18 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 5:08 AM to 5:40 AM, and sunset from 7:28 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:087:28
214.35:097:27
314.35:107:25
414.25:117:24
514.25:127:23
614.15:137:22
714.15:147:20
814.15:157:19
914.05:167:18
1014.05:177:16
1113.95:187:15
1213.95:197:14
1313.95:207:12
1413.85:217:11
1513.85:227:09
1613.75:247:08
1713.75:257:06
1813.75:267:05
1913.65:277:03
2013.65:287:02
2113.55:297:00
2213.55:306:58
2313.45:316:57
2413.45:326:55
2513.35:336:54
2613.35:346:52
2713.25:366:50
2813.25:376:48
2913.15:386:47
3013.15:396:45
3113.15:406:43

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.18 kWh/m².

For context, solar energy here swings from a low near 1.57 kWh/m² to a high of 7.06 kWh/m² in July across the year — August's 6.18 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.6Intense
56.6Intense
66.6Intense
76.5Intense
86.5Intense
96.5Intense
106.4Intense
116.4Intense
126.3Intense
136.3Intense
146.3Intense
156.2Intense
166.2Intense
176.2Intense
186.1Intense
196.1Intense
206.0Intense
216.0Bright
225.9Bright
235.9Bright
245.8Bright
255.8Bright
265.7Bright
275.7Bright
285.6Bright
295.5Bright
305.5Bright
315.4Bright
Planning a trip in August

Is August a good time to visit Viterbo?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.1
Sightseeing
6th-best month of the year
8.0
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Viterbo for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Viterbo in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Viterbo sees daytime highs around 30°C and nights near 19°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

Sea temperature near Viterbo in August

The nearest coast averages about 25°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 40 km away) is warmest in August at about 25°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 2 to Oct 31 — about 5 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Viterbo in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Viterbo peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 14UV 9Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5Moderate
Apr5Moderate
May7High
Jun9Very high
Jul9Very high
Aug8Very high
Sep5High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Viterbo?

Viterbo sits at 42.4°N, 12.1°E, 326 m above sea level, in Italy. The nearest listed city is Civitavecchia, 44 km away.

Topography around Viterbo

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Viterbo.

Within 3 km, the terrain around Viterbo has significant variations in elevation — a maximum elevation change of 280 m around an average of 352 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,009 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,182 m.

The land around Viterbo is covered by trees (51%) and artificial surfaces (24%) within 3 km, trees (57%) and cropland (27%) within 16 km, and trees (47%) and cropland (20%) within 80 km.

3 km
280 m
16 km
1,009 m
80 km
2,182 m
treesshrubsgrasslandcroplandartificial surfaceswater
August weather nearby: Civitavecchia 44 km · Terni 47 km · Todi 47 km · Cerveteri 48 km · Ladispoli 52 km · Monterotondo 59 km · Mentana 62 km · Rieti 62 km

Italy travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / L
230 V · 50 Hz
Prices
≈ 69% of US
price level, 2025
GDP per capita
$43,309
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.6
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 513
Religion
Christian 81%unaffiliated 13%Muslim 5%other 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Viterbo (42.4194°, 12.1056°, elevation 326 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).