Alghero weather in September

In September, Alghero sees average daytime highs of 24°C and overnight lows near 20°C, with 35 mm of rain across 5.1 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 61% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Alghero's 4th-clearest and 8th-windiest month. For the whole year in context, see Alghero's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
35 mm
5.1 wet days
Daylight
12 h 18 min
6:13 AM – 6:29 PM
Cloud cover
36%
4th clearest
Wind
13 km/h
8th windiest
Solar energy
5.03 kWh/m²
Travel score
8.1
out of 10

Alghero is chief town of the homonym municipality.

Air quality
Good
PM10 18.9 µg/m³ · 2019

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 26°C in the first days to 23°C by the end.

A typical September day in Alghero reaches about 24°C in the afternoon and slips back to 20°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 27°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)
12622
22622
32621
42621
52621
62521
72521
82521
92521
102521
112521
122521
132520
142520
152420
162420
172420
182420
192420
202420
212420
222420
232419
242419
252319
262319
272319
282319
292319
302319

Alghero weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan13° / 10°528.69.43.9
Feb13° / 508.110.43.8
Mar15° / 11°447.511.74.8
Apr17° / 12°508135.7
May20° / 16°355.414.27.3
Jun24° / 19°152.614.88.7
Jul26° / 22°50.914.69.0
Aug27° / 22°71.613.68.6
Sep24° / 20°355.112.38.1
Oct21° / 17°668.110.97.1
Nov17° / 14°9211.19.75.5
Dec14° / 11°719.99.24.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 61% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% 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 (%)
18515
28416
38317
48218
58119
68119
77921
87921
97822
107723
117624
127525
137525
147525
157327
167327
177327
187327
197228
207228
217228
227228
237129
247129
257129
267129
277129
287129
297129
307129

Chance of precipitation in September

Any precipitation

Alghero gets around 35 mm of rain over 5.1 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 17% and peaks near 23% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
19
29
310
411
511
612
713
814
914
1015
1116
1216
1317
1417
1518
1618
1719
1819
1920
2020
2120
2221
2321
2421
2522
2622
2722
2823
2923
3023

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 35% of days. Sticky, muggy-or-worse air turns up on roughly 39% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1115274512
2216274511
321628459
421728448
531728447
631829447
731829446
841830435
941830435
1051830425
1151930424
1251931414
1362031404
1462031394
1572131374
1672132364
1782233353
1882234333
1992234323
2092335303
21102436292
22102436272
23102537262
24112538252
25112638241
26112638231
27122739221
28122739211
29132839201
30132839200

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
1314light breeze
1414light 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 12 h 54 min 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 78 minutes over September. Sunrise moves from 5:58 AM to 6:27 AM, and sunset from 6:55 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:586:55
212.95:596:53
312.96:006:51
412.86:016:50
512.86:026:48
612.76:036:46
712.76:046:45
812.66:056:43
912.66:066:41
1012.56:076:39
1112.56:086:38
1212.46:096:36
1312.46:106:34
1412.46:116:32
1512.36:126:31
1612.36:136:29
1712.26:146:27
1812.26:156:25
1912.16:166:24
2012.16:176:22
2112.06:186:20
2212.06:196:18
2311.96:206:17
2411.96:216:15
2511.96:226:13
2611.86:236:12
2711.86:246:10
2811.76:256:08
2911.76:266:06
3011.66:276:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.03 kWh/m².

For context, solar energy here swings from a low near 1.85 kWh/m² to a high of 7.49 kWh/m² in July across the year — September's 5.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.8Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.5Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.2Bright
135.2Bright
145.1Bright
155.0Bright
165.0Bright
174.9Bright
184.9Bright
194.8Bright
204.8Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.5Bright
264.5Bright
274.4Bright
284.4Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Alghero

In seasonPeak

None of Alghero's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Alghero's rainy season runs October–April, 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 Alghero?

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

8.1
Sightseeing
4th-best month of the year
7.0
Beach & pool
4th-best month of the year

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

What to pack for Alghero in September

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

In September, Alghero sees daytime highs around 24°C and nights near 20°C. Worth packing: light clothes and sun protection. About 5 days see rain.

light clothessun protection

Sea temperature near Alghero in September

The nearest coast averages about 23°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 18 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 8 to Oct 27 — about 4.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul24Refreshing
Aug25Warm
Sep23Refreshing
Oct21Refreshing
Nov18Cool
Dec16Cool

UV index in Alghero 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 Alghero peaks around July 15 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 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highHighModerateLowJul 15UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr4Moderate
May7Very high
Jun8Very high
Jul10Very high
Aug7Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Alghero 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 Alghero is worst in July — around 15 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodJul 1615 µg/m³Dec 147 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar13Moderate
Apr13Moderate
May13Moderate
Jun11Good
Jul15Moderate
Aug10Good
Sep10Good
Oct9Good
Nov8Good
Dec7Good
Location & terrain

Where is Alghero?

Alghero sits at 40.6°N, 8.3°E, 7 m above sea level, in Italy. The nearest listed city is Sassari, 27 km away.

OristanoNuoroOlbiaIglesiasAssemini

Topography around Alghero

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

Within 3 km, the terrain around Alghero has only modest variations in elevation — a maximum elevation change of 116 m around an average of 20 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 712 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,336 m.

The land around Alghero is covered by water (45%) and trees (24%) within 3 km, water (39%), grassland (27%) and trees (22%) within 16 km, and water (48%), trees (22%) and grassland (20%) within 80 km.

3 km
116 m
16 km
712 m
80 km
1,336 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Sassari 27 km · Monte Rosello 29 km · Porto Torres 31 km · Oristano 77 km · Nuoro 89 km · Olbia 107 km · Iglesias 140 km · Assemini 152 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 Alghero (40.5597°, 8.3195°, elevation 7 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).