Aci Castello weather in December

In December, Aci Castello sees average daytime highs of 16°C and overnight lows near 12°C, with 77 mm of rain across 8.8 wet days and about 9.5 hours of daylight. It is the 9th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 16°C in the first days to 15°C by the end. The sky is clear or mostly clear about 47% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of December to 9 h 24 min by month's end. Set against the rest of the year, December is Aci Castello's 11th-clearest and 1st-windiest month. For the whole year in context, see Aci Castello's year-round climate.

Daytime high
16°
9th warmest
Overnight low
12°
4th coldest
Rainfall
77 mm
8.8 wet days
Daylight
9 h 24 min
7:13 AM – 4:38 PM
Cloud cover
47%
11th clearest
Wind
13 km/h
1st windiest
Solar energy
2.11 kWh/m²
Travel score
5.1
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 December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 16°C in the first days to 15°C by the end.

A typical December day in Aci Castello reaches about 16°C in the afternoon and slips back to 12°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 18°C. Set against its neighbours, December runs about 3°C cooler than November and about 1°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11714
21714
31714
41613
51613
61613
71613
81613
91613
101613
111613
121613
131613
141613
151612
161512
171512
181512
191512
201512
211512
221512
231512
241512
251512
261512
271512
281512
291512
301511
311511

Aci Castello weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 3rd-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 36%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36238
46337
56337
66337
76436
86436
96436
106436
116436
126436
136436
146436
156436
166337
176337
186337
196337
206337
216337
226436
236436
246436
256436
266535
276535
286634
296733
306832
316832

Chance of precipitation in December

Any precipitation

Aci Castello gets around 77 mm of rain over 8.8 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
329
429
529
629
729
829
929
1029
1129
1229
1329
1429
1529
1628
1728
1828
1928
2027
2127
2227
2327
2427
2526
2626
2726
2825
2925
3024
3124

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
180182
282162
383152
486131
587121
688111
789101
89091
99181
109271
119370
129370
139460
149460
159460
169460
179550
189550
199550
209550
219550
229640
239640
249640
259640
269730
279730
289730
299730
309820
319820

Wind in December

Winds average 13 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light 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
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 36 min at the start of December to 9 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:01 AM to 7:19 AM, and sunset from 4:37 PM to 4:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:014:37
29.67:024:37
39.67:034:37
49.57:044:37
59.57:054:37
69.57:064:37
79.57:064:37
89.57:074:37
99.57:084:37
109.57:094:37
119.57:104:37
129.47:104:37
139.47:114:37
149.47:124:38
159.47:124:38
169.47:134:38
179.47:144:38
189.47:144:39
199.47:154:39
209.47:154:40
219.47:164:40
229.47:164:40
239.47:174:41
249.47:174:41
259.47:184:42
269.47:184:43
279.47:184:43
289.47:194:44
299.47:194:44
309.47:194:45
319.47:194:46

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.11 kWh/m² — the year's lowest.

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 — December's 2.11 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.2Moderate
22.2Moderate
32.2Moderate
42.2Moderate
52.1Moderate
62.1Moderate
72.1Moderate
82.1Moderate
92.1Moderate
102.1Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.1Moderate
192.1Moderate
202.1Moderate
212.1Moderate
222.1Moderate
232.1Moderate
242.1Moderate
252.1Moderate
262.1Moderate
272.1Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.2Moderate
Planning a trip in December

Is December a good time to visit Aci Castello?

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

5.1
Sightseeing
10th-best month of the year
0.4
Beach & pool
9th-best month of the year

December is a reasonable time to visit Aci Castello for sightseeing.

What to pack for Aci Castello in December

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

In December, Aci Castello sees daytime highs around 16°C and nights near 12°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Aci Castello in December

The nearest coast averages about 17°C in December — 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 December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. 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 December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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
December 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).