Cerveteri weather in September

In September, Cerveteri sees average daytime highs of 23°C and overnight lows near 19°C, with 86 mm of rain across 8.5 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 25°C in the first days to 22°C by the end. The sky is clear or mostly clear about 60% of the time in September, and the air most often feels humid.

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 Cerveteri's 4th-clearest and 8th-windiest month. For the whole year in context, see Cerveteri's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
86 mm
8.5 wet days
Daylight
12 h 18 min
5:58 AM – 6:14 PM
Cloud cover
37%
4th clearest
Wind
13 km/h
8th windiest
Solar energy
4.66 kWh/m²
Travel score
7.4
out of 10

Cerveteri is an ancient Etruscan metropolis, today Cerveteri.

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 25°C in the first days to 22°C by the end.

A typical September day in Cerveteri reaches about 23°C in the afternoon and slips back to 19°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 26°C. Set against its neighbours, September runs about 3°C cooler than August and about 3°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12521
22521
32521
42521
52520
62520
72520
82420
92420
102420
112420
122420
132420
142419
152419
162319
172319
182319
192319
202319
212319
222319
232318
242218
252218
262218
272218
282218
292218
302218

Cerveteri 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° / 78109.33.1
Feb12° / 789.510.33.3
Mar14° / 718.411.74.3
Apr16° / 12°659.113.15.2
May20° / 15°426.714.37.0
Jun23° / 19°264.2158.3
Jul26° / 22°162.114.78.8
Aug27° / 22°22313.78.4
Sep23° / 19°868.512.37.4
Oct20° / 16°12910.810.96.4
Nov16° / 12°16313.49.64.7
Dec13° / 1101293.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 25%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28416
38218
48218
58119
68020
77921
87921
97822
107624
117525
127525
137426
147426
157327
167327
177228
187228
197228
207228
217228
227228
237129
247129
257129
267129
276931
286931
296931
306931

Chance of precipitation in September

Any precipitation

Cerveteri gets around 86 mm of rain over 8.5 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 29% and peaks near 32% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
121
222
323
423
524
625
726
827
928
1029
1129
1230
1330
1430
1531
1631
1731
1831
1931
2031
2131
2231
2331
2431
2531
2631
2731
2831
2932
3032

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 37% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1510264317
2511274215
3611284213
4612304111
5613314110
661331418
761432417
861433406
971533405
1071533405
1171633404
1271633404
1381733393
1481733393
1581833383
1691933372
1792033362
18102133342
19102234322
20112234312
21122334291
22132435271
23132436251
24142537241
25142538221
26142639201
27152740180
28152741170
29152841150
30152942140

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light 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 5:42 AM to 6:13 AM, and sunset from 6:41 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:426:41
212.95:436:39
312.95:446:38
412.95:456:36
512.85:466:34
612.85:476:32
712.75:486:31
812.75:496:29
912.65:506:27
1012.65:516:25
1112.55:526:23
1212.55:536:22
1312.45:546:20
1412.45:556:18
1512.35:576:16
1612.35:586:14
1712.25:596:12
1812.26:006:11
1912.16:016:09
2012.16:026:07
2112.06:036:05
2212.06:046:03
2311.96:056:02
2411.96:066:00
2511.86:075:58
2611.86:085:56
2711.76:105:54
2811.76:115:53
2911.66:125:51
3011.66:135:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.66 kWh/m².

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 7.17 kWh/m² in July across the year — September's 4.66 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.4Bright
35.4Bright
45.3Bright
55.2Bright
65.2Bright
75.1Bright
85.1Bright
95.0Bright
104.9Bright
114.9Bright
124.8Bright
134.8Bright
144.7Bright
154.7Bright
164.6Bright
174.5Bright
184.5Bright
194.4Bright
204.4Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.0Bright
284.0Bright
294.0Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Cerveteri

In seasonPeak

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

Cerveteri'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 Cerveteri?

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

7.4
Sightseeing
4th-best month of the year
6.0
Beach & pool
4th-best month of the year

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

What to pack for Cerveteri in September

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

In September, Cerveteri sees daytime highs around 23°C and nights near 19°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Cerveteri in September

The nearest coast averages about 24°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 13 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 1 to Oct 31 — about 5 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug25Warm
Sep24Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Cerveteri 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 Cerveteri 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
Jun9Very high
Jul9Very high
Aug8Very high
Sep5High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Cerveteri?

Cerveteri sits at 42.0°N, 12.1°E, 81 m above sea level, in Italy. The nearest listed city is Ladispoli, 5.0 km away.

Topography around Cerveteri

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

Within 3 km, the terrain around Cerveteri has only modest variations in elevation — a maximum elevation change of 159 m around an average of 48 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 529 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,493 m.

The land around Cerveteri is covered by grassland (31%) and cropland (27%) within 3 km, water (33%), trees (25%) and cropland (22%) within 16 km, and trees (38%) and water (31%) within 80 km.

3 km
159 m
16 km
529 m
80 km
1,493 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Ladispoli 5.0 km · Civitavecchia 27 km · Fiumicino 27 km · Vatican City 32 km · Acilia-Castel Fusano-Ostia Antica 32 km · Lido di Ostia 33 km · Malafede 34 km · Casal Palocco 34 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 Cerveteri (41.9908°, 12.0908°, elevation 81 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).