Aci Castello weather in September

In September, Aci Castello sees average daytime highs of 25°C and overnight lows near 22°C, with 50 mm of rain across 5.5 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 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 66% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Aci Castello's 4th-clearest and 9th-windiest month. For the whole year in context, see Aci Castello's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
50 mm
5.5 wet days
Daylight
12 h 12 min
5:47 AM – 6:01 PM
Cloud cover
34%
4th clearest
Wind
9 km/h
9th windiest
Solar energy
4.89 kWh/m²
Travel score
8.0
out of 10

Aci Castello 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 27°C in the first days to 24°C by the end.

A typical September day in Aci Castello reaches about 25°C in the afternoon and slips back to 22°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 28°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)
12724
22724
32724
42724
52724
62623
72623
82623
92623
102623
112623
122623
132623
142623
152522
162522
172522
182522
192522
202522
212522
222522
232522
242421
252421
262421
272421
282421
292421
302421

Aci Castello 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
Jan14° / 11°838.49.74.4
Feb14° / 11°616.910.64.5
Mar15° / 12°526.711.75.2
Apr17° / 14°336.112.96.3
May20° / 17°163.4147.8
Jun24° / 21°121.914.58.9
Jul27° / 24°4114.38.8
Aug28° / 25°81.413.48.3
Sep25° / 22°505.512.38.0
Oct22° / 19°778.2117.3
Nov19° / 16°838.4106.4
Dec16° / 12°778.89.55.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 66% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 17%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1919
2919
39010
48911
58812
68812
78713
88713
98614
108614
118614
128515
138515
148416
158317
168317
178218
188218
198119
207921
217921
227822
237822
247723
257624
267624
277624
287624
297525
307525

Chance of precipitation in September

Any precipitation

Aci Castello gets around 50 mm of rain over 5.5 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 18% and peaks near 25% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
110
211
311
412
512
613
713
814
914
1014
1115
1215
1315
1416
1517
1617
1718
1819
1920
2021
2121
2222
2323
2423
2524
2624
2724
2825
2925
3025

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 56% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
103175030
204195027
304205125
404215123
505235121
615245119
715255118
816275017
916285015
1016285015
1117294914
1217304913
1317314812
1418324712
1518334711
1629344610
1729354510
1821036449
1921037429
2021138418
2121239407
2231240387
2331341377
2431342366
2531443346
2631544335
2731545325
2831645314
2931746304
3031746303

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 5:34 AM to 5:59 AM, and sunset from 6:25 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:346:25
212.85:356:23
312.85:356:21
412.75:366:20
512.75:376:18
612.65:386:17
712.65:396:15
812.65:406:14
912.55:416:12
1012.55:416:10
1112.45:426:09
1212.45:436:07
1312.45:446:06
1412.35:456:04
1512.35:466:02
1612.25:476:01
1712.25:475:59
1812.25:485:58
1912.15:495:56
2012.15:505:54
2112.05:515:53
2212.05:525:51
2311.95:535:50
2411.95:545:48
2511.95:545:46
2611.85:555:45
2711.85:565:43
2811.75:575:42
2911.75:585:40
3011.75:595:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.89 kWh/m².

For context, solar energy here swings from a low near 2.11 kWh/m² to a high of 7.32 kWh/m² in July across the year — September's 4.89 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.4Bright
75.3Bright
85.3Bright
95.2Bright
105.2Bright
115.1Bright
125.1Bright
135.0Bright
145.0Bright
154.9Bright
164.9Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.6Bright
224.6Bright
234.5Bright
244.5Bright
254.5Bright
264.4Bright
274.4Bright
284.3Bright
294.3Bright
304.3Bright
Planning a trip in September

Is September a good time to visit Aci Castello?

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

8.0
Sightseeing
4th-best month of the year
7.4
Beach & pool
4th-best month of the year

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

What to pack for Aci Castello in September

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

In September, Aci Castello sees daytime highs around 25°C and nights near 22°C. Worth packing: light clothes and sun protection. About 6 days see rain.

light clothessun protection

Sea temperature near Aci Castello in September

The nearest coast averages about 25°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 20 km away) is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from Jun 2 to Nov 11 — about 5.4 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb15Bracing
Mar15Bracing
Apr16Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Aci Castello in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aci Castello peaks around July 15 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighHighVery highVery highHighModerateJul 15UV 10Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb4Moderate
Mar6High
Apr5Moderate
May6High
Jun9Very high
Jul10Extreme
Aug9Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Aci Castello 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 Aci Castello is worst in April — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 2217 µg/m³Dec 1511 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar16Moderate
Apr17Moderate
May17Moderate
Jun16Moderate
Jul14Moderate
Aug15Moderate
Sep14Moderate
Oct13Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Aci Castello?

Aci Castello sits at 37.6°N, 15.1°E, 15 m above sea level, in Italy. The nearest listed city is San Giovanni la Punta, 5.0 km away.

Topography around Aci Castello

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

Within 3 km, the terrain around Aci Castello has significant variations in elevation — a maximum elevation change of 376 m around an average of 90 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,348 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,306 m.

The land around Aci Castello is covered by water (42%) and trees (38%) within 3 km, water (51%) and trees (27%) within 16 km, and water (36%), trees (27%) and grassland (21%) within 80 km.

3 km
376 m
16 km
1,348 m
80 km
3,306 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: San Giovanni la Punta 5.0 km · Aci Catena 6.0 km · Acireale 6.0 km · Gravina di Catania 7.0 km · Mascalucia 9.0 km · Catania 10 km · Misterbianco 13 km · Belpasso 15 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 Aci Castello (37.5556°, 15.1454°, elevation 15 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).