Civitavecchia weather in September

In September, Civitavecchia sees average daytime highs of 23°C and overnight lows near 21°C, with 77 mm of rain across 7.3 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 62% of the time in September, and the air most often feels muggy.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Civitavecchia's 4th-clearest and 8th-windiest month. For the whole year in context, see Civitavecchia's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
77 mm
7.3 wet days
Daylight
12 h 18 min
5:59 AM – 6:16 PM
Cloud cover
35%
4th clearest
Wind
16 km/h
8th windiest
Solar energy
4.72 kWh/m²
Travel score
7.6
out of 10
Air quality
Good
PM2.5 8.7 µg/m³ · 2019

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 22°C by the end.

A typical September day in Civitavecchia reaches about 23°C in the afternoon and slips back to 21°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 25°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12422
22422
32422
42422
52422
62422
72421
82421
92421
102321
112321
122321
132321
142321
152321
162320
172320
182320
192320
202220
212220
222220
232220
242220
252219
262219
272219
282219
292219
302119

Civitavecchia weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 10°759.99.33.4
Feb12° / 719.110.33.4
Mar13° / 11°627.611.74.2
Apr15° / 13°567.913.15.1
May19° / 16°335.714.46.9
Jun22° / 20°213.2158.4
Jul25° / 23°121.414.89.2
Aug25° / 23°192.313.78.8
Sep23° / 21°777.312.37.6
Oct20° / 17°11710.310.86.5
Nov16° / 14°15312.79.64.9
Dec13° / 11°10112.193.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 62% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28317
38218
48218
58119
68119
78020
87822
97822
107723
117723
127624
137525
147525
157426
167426
177327
187327
197327
207327
217327
227228
237228
247228
257228
267228
277228
287129
297129
307129

Chance of precipitation in September

Any precipitation

Civitavecchia gets around 77 mm of rain over 7.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 29% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
116
216
317
418
519
620
721
822
923
1024
1124
1225
1326
1426
1527
1627
1728
1828
1928
2028
2128
2228
2328
2428
2528
2628
2728
2828
2929
3029

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 42% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1482539241
2582639220
3592739190
45102839170
55102939160
66113039140
76113139130
86123140110
96123240100
10613324090
11713324080
12714324080
13714314070
14715324060
15816313960
16817313850
17818313750
18919323640
191020323540
201021323330
211122323230
221123333030
231223332920
241224342820
251325352610
261326362510
271326372310
281327372210
291428382000
301429381900

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 5:43 AM to 6:14 AM, and sunset from 6:42 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:436:42
212.95:446:41
312.95:456:39
412.95:466:37
512.85:476:35
612.85:486:34
712.75:496:32
812.75:506:30
912.65:516:28
1012.65:526:26
1112.55:536:25
1212.55:546:23
1312.45:566:21
1412.45:576:19
1512.35:586:17
1612.35:596:16
1712.26:006:14
1812.26:016:12
1912.16:026:10
2012.16:036:08
2112.06:046:06
2212.06:056:05
2311.96:066:03
2411.96:076:01
2511.86:095:59
2611.86:105:57
2711.76:115:55
2811.76:125:54
2911.66:135:52
3011.66:145:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.72 kWh/m².

For context, solar energy here swings from a low near 1.69 kWh/m² to a high of 7.21 kWh/m² in July across the year — September's 4.72 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.4Bright
55.3Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.0Bright
114.9Bright
124.9Bright
134.8Bright
144.8Bright
154.7Bright
164.7Bright
174.6Bright
184.5Bright
194.5Bright
204.5Bright
214.4Bright
224.4Bright
234.3Bright
244.3Bright
254.2Bright
264.2Bright
274.1Bright
284.1Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Civitavecchia

In seasonPeak

In September, Civitavecchia sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Civitavecchia's rainy season runs September–February, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Civitavecchia?

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

7.6
Sightseeing
4th-best month of the year
5.8
Beach & pool
4th-best month of the year

September is one of the better times to visit Civitavecchia for general sightseeing.

What to pack for Civitavecchia in September

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

In September, Civitavecchia sees daytime highs around 23°C and nights near 21°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near Civitavecchia in September

The nearest coast averages about 23°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 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 29 — about 4.9 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 Civitavecchia in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Civitavecchia peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highHighModerateLowJul 14UV 9Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5Moderate
Apr4Moderate
May7High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Civitavecchia?

Civitavecchia sits at 42.1°N, 11.8°E, 10 m above sea level, in Italy. The nearest listed city is Cerveteri, 27 km away.

Topography around Civitavecchia

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

Within 3 km, the terrain around Civitavecchia has only modest variations in elevation — a maximum elevation change of 178 m around an average of 37 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 636 m; within 80 km, large variations in elevation — a maximum elevation change of 1,119 m.

The land around Civitavecchia is covered by water (38%) and artificial surfaces (25%) within 3 km, water (54%) within 16 km, and water (37%) and trees (32%) within 80 km.

3 km
178 m
16 km
636 m
80 km
1,119 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Cerveteri 27 km · Ladispoli 28 km · Viterbo 44 km · Fiumicino 51 km · Lido di Ostia 56 km · Acilia-Castel Fusano-Ostia Antica 57 km · Vatican City 58 km · Casal Palocco 60 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 Civitavecchia (42.0932°, 11.7967°, elevation 10 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).