Bacoli weather in September

In September, Bacoli sees average daytime highs of 24°C and overnight lows near 21°C, with 77 mm of rain across 7.8 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 7th-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 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 Bacoli's 4th-clearest and 8th-windiest month. For the whole year in context, see Bacoli's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
77 mm
7.8 wet days
Daylight
12 h 18 min
5:50 AM – 6:06 PM
Cloud cover
36%
4th clearest
Wind
13 km/h
8th windiest
Solar energy
4.73 kWh/m²
Travel score
7.7
out of 10

Bacoli is chief town of the homonym municipality.

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 Bacoli reaches about 24°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 22°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)
12523
22523
32523
42523
52523
62522
72522
82422
92422
102422
112422
122422
132422
142422
152421
162421
172421
182321
192321
202321
212321
222321
232321
242321
252320
262320
272320
282220
292220
302220

Bacoli weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan13° / 10°105119.43.5
Feb13° / 10°8910.410.43.4
Mar14° / 11°819.411.74.2
Apr16° / 13°63813.15.3
May19° / 17°365.414.27.1
Jun23° / 21°18314.98.6
Jul25° / 24°101.814.69.0
Aug26° / 24°172.413.68.6
Sep24° / 21°777.812.37.7
Oct21° / 18°1109.810.96.7
Nov17° / 15°16513.69.75.2
Dec14° / 12°13313.19.14.0

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 15% of September, with mostly cloudy or overcast conditions the remaining 23%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18614
28614
38416
48416
58317
68218
78119
88020
97921
107921
117822
127723
137723
147723
157624
167624
177624
187624
197525
207525
217525
227426
237426
247426
257327
267228
277228
287228
297228
307129

Chance of precipitation in September

Any precipitation

Bacoli gets around 77 mm of rain over 7.8 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 26% and peaks near 30% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
117
218
319
420
521
621
722
823
924
1025
1125
1226
1327
1427
1528
1628
1729
1829
1929
2030
2130
2229
2329
2429
2529
2629
2729
2829
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 32% of days. Sticky, muggy-or-worse air turns up on roughly 43% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1482334301
2492434271
3592535251
45102635231
55112736201
65112837180
76122937170
86122938150
96132939140
106132939120
116143040110
126143040100
136153039100
14716303990
15716303880
16717303780
17818313670
18820313470
19921313370
20922313160
211023313060
221024322860
231125322750
241126332550
251126332450
261227342340
271228352240
281228362140
291329361930
301329371830

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 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
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light 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 5:35 AM to 6:04 AM, and sunset from 6:32 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:356:32
212.95:366:30
312.95:376:29
412.85:386:27
512.85:396:25
612.75:406:23
712.75:416:22
812.65:426:20
912.65:436:18
1012.55:446:17
1112.55:456:15
1212.55:466:13
1312.45:476:11
1412.45:486:10
1512.35:496:08
1612.35:506:06
1712.25:516:04
1812.25:526:03
1912.15:536:01
2012.15:545:59
2112.05:555:57
2212.05:565:55
2311.95:575:54
2411.95:585:52
2511.85:595:50
2611.86:005:48
2711.86:015:47
2811.76:025:45
2911.76:035:43
3011.66:045:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.73 kWh/m².

For context, solar energy here swings from a low near 1.75 kWh/m² to a high of 7.13 kWh/m² in June across the year — September's 4.73 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
124.9Bright
134.8Bright
144.8Bright
154.8Bright
164.7Bright
174.7Bright
184.6Bright
194.5Bright
204.5Bright
214.5Bright
224.4Bright
234.3Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.0Bright
Planning a trip in September

Hazard calendar for Bacoli

In seasonPeak

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

Bacoli's rainy season runs September–March, 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 Bacoli?

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

7.7
Sightseeing
4th-best month of the year
6.3
Beach & pool
4th-best month of the year

September is one of the better times to visit Bacoli for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Bacoli in September

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

In September, Bacoli sees daytime highs around 24°C and nights near 21°C. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

Sea temperature near Bacoli 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 19 km away) is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from May 27 to Nov 5 — about 5.4 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug26Warm
Sep24Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Bacoli in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bacoli peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highHighModerateLowJul 16UV 9Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr4Moderate
May7High
Jun9Very high
Jul10Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Bacoli in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Bacoli is worst in April — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 916 µg/m³Dec 1110 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar16Moderate
Apr16Moderate
May14Moderate
Jun13Moderate
Jul11Good
Aug12Good
Sep12Good
Oct12Good
Nov10Good
Dec10Good
Location & terrain

Where is Bacoli?

Bacoli sits at 40.8°N, 14.1°E, 30 m above sea level, in Italy. The nearest listed city is Pozzuoli, 6.0 km away.

Topography around Bacoli

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

Within 3 km, the terrain around Bacoli has only modest variations in elevation — a maximum elevation change of 152 m around an average of 14 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 638 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,032 m.

The land around Bacoli is covered by water (65%) within 3 km, water (71%) within 16 km, and water (53%) and trees (30%) within 80 km.

3 km
152 m
16 km
638 m
80 km
2,032 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Pozzuoli 6.0 km · Monterusciello 8.0 km · Bagnoli 8.0 km · Posillipo 11 km · Quarto 11 km · Pianura 11 km · Soccavo 11 km · Fuorigrotta 11 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 Bacoli (40.7967°, 14.0735°, elevation 30 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).