Portofino weather in September

In September, Portofino sees average daytime highs of 22°C and overnight lows near 20°C, with 102 mm of rain across 8.7 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 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels humid.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Portofino's 3rd-clearest and 8th-windiest month. For the whole year in context, see Portofino's year-round climate.

Daytime high
22°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
102 mm
8.7 wet days
Daylight
12 h 18 min
6:08 AM – 6:27 PM
Cloud cover
41%
3rd clearest
Wind
12 km/h
8th windiest
Solar energy
4.21 kWh/m²
Travel score
7.0
out of 10

Portofino is settlement in Liguria, Italy.

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 23°C in the first days to 20°C by the end.

A typical September day in Portofino reaches about 22°C in the afternoon and slips back to 20°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 24°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)
12321
22321
32321
42321
52321
62321
72321
82320
92220
102220
112220
122220
132220
142220
152220
162219
172119
182119
192119
202119
212119
222119
232119
242118
252118
262018
272018
282018
292018
302018

Portofino 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
Jan11° / 12912.19.12.4
Feb11° / 10711.310.22.4
Mar12° / 10°10410.711.63.3
Apr14° / 12°9210.313.24.3
May18° / 16°70914.56.0
Jun21° / 19°46715.37.3
Jul24° / 22°254.1158.5
Aug24° / 22°406.113.88.1
Sep22° / 20°1028.712.37.0
Oct18° / 16°17912.910.85.7
Nov15° / 13°21414.69.43.9
Dec12° / 10°15814.18.72.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27723
37723
47723
57624
67624
77624
87525
97426
107327
117327
127129
137129
147129
157030
166931
176832
186832
196832
206733
216733
226634
236634
246634
256535
266535
276436
286436
296337
306238

Chance of precipitation in September

Any precipitation

Portofino gets around 102 mm of rain over 8.7 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 30% and peaks near 39% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
122
222
322
423
523
623
724
825
925
1026
1127
1228
1329
1430
1531
1632
1732
1833
1933
2034
2134
2235
2335
2436
2536
2637
2737
2838
2939
3039

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 38% of days. Sticky, muggy-or-worse air turns up on roughly 15% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
181639334
291740313
391840303
4101940282
5112141262
6112241251
7122241231
8132341221
9142342210
10152442200
11162442190
12172441170
13182541160
14182541150
15192640140
16202739130
17222838120
18232838110
19242937100
2025303690
2126313680
2226313570
2327323570
2427333460
2528333450
2628343340
2729343340
2830343330
2931343230
3032343230

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 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 90 minutes over September. Sunrise moves from 5:51 AM to 6:25 AM, and sunset from 6:55 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:516:55
213.05:526:53
313.05:536:51
412.95:546:50
512.95:556:48
612.85:576:46
712.85:586:44
812.75:596:42
912.76:006:40
1012.66:016:38
1112.66:026:36
1212.56:046:34
1312.56:056:32
1412.46:066:30
1512.46:076:28
1612.36:086:27
1712.26:106:25
1812.26:116:23
1912.16:126:21
2012.16:136:19
2112.06:146:17
2212.06:166:15
2311.96:176:13
2411.96:186:11
2511.86:196:09
2611.86:216:07
2711.76:226:05
2811.76:236:03
2911.66:246:01
3011.66:255:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.21 kWh/m².

For context, solar energy here swings from a low near 1.34 kWh/m² to a high of 6.57 kWh/m² in July across the year — September's 4.21 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.8Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.6Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.1Bright
184.0Bright
194.0Bright
204.0Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.6Moderate
273.6Moderate
283.5Moderate
293.5Moderate
303.4Moderate
Planning a trip in September

Hazard calendar for Portofino

In seasonPeak

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

Portofino'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 Portofino?

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

7.0
Sightseeing
4th-best month of the year
4.7
Beach & pool
4th-best month of the year

September is one of the better times to visit Portofino for general sightseeing.

What to pack for Portofino in September

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

In September, Portofino sees daytime highs around 22°C and nights near 20°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Portofino 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 offshore is warmest in August at about 25°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 2 to Oct 20 — about 4.6 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Bracing
May18Cool
Jun22Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct20Refreshing
Nov18Cool
Dec16Cool

UV index in Portofino in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Portofino peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowJul 14UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar4Moderate
Apr7Very high
May6High
Jun8Very high
Jul9Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

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

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateGoodMar 2016 µg/m³Dec 1011 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar16Moderate
Apr15Moderate
May14Moderate
Jun14Moderate
Jul12Good
Aug13Moderate
Sep12Good
Oct13Moderate
Nov11Good
Dec11Good
Location & terrain

Where is Portofino?

Portofino sits at 44.3°N, 9.2°E, 0 m above sea level, in Italy. The nearest listed city is Rapallo, 5.0 km away.

Topography around Portofino

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

Within 3 km, the terrain around Portofino has significant variations in elevation — a maximum elevation change of 506 m around an average of 46 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,220 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,979 m.

The land around Portofino is covered by water (76%) and trees (22%) within 3 km, water (63%) and trees (33%) within 16 km, and trees (53%) and water (31%) within 80 km.

3 km
506 m
16 km
1,220 m
80 km
1,979 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Rapallo 5.0 km · Chiavari 9.0 km · Sestri Levante 15 km · Genoa 24 km · Cinque Terre 47 km · La Spezia 54 km · Savona 58 km · Novi Ligure 61 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 Portofino (44.3035°, 9.2094°, elevation 0 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).