Castelvetrano weather in December

In December, Castelvetrano sees average daytime highs of 16°C and overnight lows near 10°C, with 66 mm of rain across 10.2 wet days and about 9.4 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 15°C by the end. The sky is clear or mostly clear about 35% 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 Castelvetrano's 12th-clearest and 1st-windiest month. For the whole year in context, see Castelvetrano's year-round climate.

Daytime high
16°
10th warmest
Overnight low
10°
4th coldest
Rainfall
66 mm
10.2 wet days
Daylight
9 h 24 min
7:23 AM – 4:47 PM
Cloud cover
53%
12th clearest
Wind
15 km/h
1st windiest
Solar energy
2.13 kWh/m²
Travel score
5.0
out of 10

Castelvetrano 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 17°C in the first days to 15°C by the end.

A typical December day in Castelvetrano reaches about 16°C in the afternoon and slips back to 10°C overnight — a 5°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 4°C cooler than November and about 1°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11712
21712
31711
41711
51711
61611
71611
81611
91611
101611
111611
121611
131611
141611
151610
161610
171610
181610
191510
201510
211510
221510
231510
241510
251510
261510
271510
281510
291510
30159
31159

How December really feels in Castelvetrano

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Castelvetrano weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 629.69.74.4
Feb14° / 619.510.54.4
Mar16° / 10°548.511.75.5
Apr19° / 12°467.812.96.6
May23° / 16°224.7148.1
Jun27° / 19°71.614.68.1
Jul30° / 22°30.614.36.8
Aug31° / 23°81.713.56.2
Sep27° / 20°436.412.37.3
Oct24° / 17°718.2117.4
Nov19° / 13°7310.3106.2
Dec16° / 10°6610.29.45.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55842
65842
75842
85941
96040
106040
116040
126040
136040
146040
156040
166040
176040
186040
195941
205842
215842
225842
235842
245842
255842
265842
275842
285842
295842
305941
315941

Chance of precipitation in December

Any precipitation

Castelvetrano gets around 66 mm of rain over 10.2 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 32% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
236
336
435
535
634
734
833
933
1033
1132
1232
1332
1432
1531
1631
1731
1831
1931
2031
2132
2232
2332
2432
2532
2632
2731
2831
2931
3030
3130

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 (%)
184151
285141
386131
487121
589110
690100
79190
89190
99280
109280
119370
129370
139460
149460
159460
169460
179550
189550
199550
209550
219550
229550
239550
249640
259640
269640
279640
289640
299640
309640
319640

Wind in December

Winds average 15 km/h in December, the windiest month of the year.

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

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light 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 7:11 AM to 7:29 AM, and sunset from 4:46 PM to 4:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:114:46
29.67:124:46
39.67:134:46
49.57:144:46
59.57:154:46
69.57:154:46
79.57:164:46
89.57:174:46
99.57:184:46
109.57:194:46
119.47:194:46
129.47:204:46
139.47:214:46
149.47:214:47
159.47:224:47
169.47:234:47
179.47:234:48
189.47:244:48
199.47:254:48
209.47:254:49
219.47:264:49
229.47:264:50
239.47:274:50
249.47:274:51
259.47:274:51
269.47:284:52
279.47:284:52
289.47:284:53
299.47:294:53
309.47:294:54
319.47:294:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.13 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.13 kWh/m² to a high of 7.62 kWh/m² in June across the year — December's 2.13 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.2Moderate
32.2Moderate
42.2Moderate
52.2Moderate
62.2Moderate
72.2Moderate
82.2Moderate
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 Castelvetrano?

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

5.0
Sightseeing
10th-best month of the year
0.5
Beach & pool
10th-best month of the year

December is a reasonable time to visit Castelvetrano for sightseeing.

What to pack for Castelvetrano in December

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

In December, Castelvetrano sees daytime highs around 16°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Castelvetrano in December

The nearest coast averages about 16°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 16 km away) is warmest in August at about 25°C and coldest in February near 15°C.

It's comfortable for a long swim from Jun 9 to Nov 5 — about 4.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb15Bracing
Mar15Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul24Refreshing
Aug25Warm
Sep24Refreshing
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Castelvetrano 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 Castelvetrano peaks around July 16 at about 10 (very high) — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateVery highHighModerateJul 16UV 10Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb4Moderate
Mar6High
Apr4Moderate
May5High
Jun9Very high
Jul10Extreme
Aug8Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec2Low
Location & terrain

Where is Castelvetrano?

Castelvetrano sits at 37.7°N, 12.8°E, 187 m above sea level, in Italy. The nearest listed city is Mazara del Vallo, 18 km away.

Topography around Castelvetrano

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

Within 3 km, the terrain around Castelvetrano has only modest variations in elevation — a maximum elevation change of 166 m around an average of 164 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 583 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,576 m.

The land around Castelvetrano is covered by grassland (46%) and trees (21%) within 3 km, grassland (52%) and cropland (21%) within 16 km, and water (56%) and grassland (24%) within 80 km.

3 km
166 m
16 km
583 m
80 km
1,576 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Mazara del Vallo 18 km · Sciacca 32 km · Marsala 34 km · Alcamo 36 km · Trapani 44 km · Casa Santa 44 km · Ribera 47 km · Partinico 50 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 Castelvetrano (37.6808°, 12.7919°, elevation 187 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).