Genoa weather in September

In September, Genoa sees average daytime highs of 21°C and overnight lows near 15°C, with 124 mm of rain across 11 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 19°C by the end. The sky is clear or mostly clear about 42% of the time in September, and the air most often feels dry.

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 Genoa's 3rd-clearest and 9th-windiest month. For the whole year in context, see Genoa's year-round climate.

Daytime high
21°
4th warmest
Overnight low
15°
9th coldest
Rainfall
124 mm
11 wet days
Daylight
12 h 18 min
6:09 AM – 6:28 PM
Cloud cover
48%
3rd clearest
Wind
8 km/h
9th windiest
Solar energy
4.06 kWh/m²
Travel score
6.4
out of 10

Genoa 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 23°C in the first days to 19°C by the end.

A typical September day in Genoa reaches about 21°C in the afternoon and slips back to 15°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 24°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12316
22316
32316
42316
52216
62216
72216
82215
92215
102215
112215
122115
132115
142115
152115
162114
172114
182114
192014
202014
212014
222014
232014
242013
252013
261913
271913
281913
291913
301913

How September really feels in Genoa

Once humidity and wind are folded in, September 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

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

Genoa weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9592.591.1
Feb / 728.12.510.11.6
Mar12° / 879.51.311.63.1
Apr14° / 10512.60.113.24.0
May18° / 12°10313.2014.65.4
Jun22° / 16°8211015.36.6
Jul24° / 18°5690157.5
Aug24° / 18°6710.6013.87.1
Sep21° / 15°12411012.36.4
Oct16° / 11°16512.6010.84.9
Nov11° / 19112.10.79.42.8
Dec / 11910.32.48.71.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26535
36535
46535
56535
66436
76436
86436
96337
106337
116337
126238
136139
146040
156040
165941
175941
185842
195743
205743
215743
225743
235644
245545
255446
265446
275347
285248
295149
304951

Chance of precipitation in September

Any precipitation

Genoa gets around 124 mm of rain over 11 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 38% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
237
337
436
536
636
736
836
936
1036
1137
1237
1337
1438
1538
1638
1739
1839
1939
2039
2139
2239
2339
2439
2539
2640
2740
2841
2941
3042

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 40% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
123313511
224323410
32633339
42734327
52835316
62936305
73037294
83138284
93238273
103239263
113339252
123440242
133540242
143640232
153739221
163939211
174039201
184238191
194437181
204537171
214736161
224836151
235036141
245235130
255335120
265335120
275534110
285634100
29573490
30583390

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 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
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 6:27 AM, and sunset from 6:56 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:516:56
213.05:536:55
313.05:546:53
412.95:556:51
512.95:566:49
612.85:576:47
712.85:596:45
812.76:006:43
912.76:016:41
1012.66:026:39
1112.66:036:37
1212.56:056:35
1312.56:066:33
1412.46:076:32
1512.46:086:30
1612.36:096:28
1712.36:116:26
1812.26:126:24
1912.16:136:22
2012.16:146:20
2112.06:166:18
2212.06:176:16
2311.96:186:14
2411.96:196:12
2511.86:206:10
2611.86:226:08
2711.76:236:06
2811.76:246:04
2911.66:256:02
3011.66:276:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.06 kWh/m².

For context, solar energy here swings from a low near 1.29 kWh/m² to a high of 6.41 kWh/m² in July across the year — September's 4.06 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.7Bright
54.6Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.3Bright
114.3Bright
124.2Bright
134.2Bright
144.1Bright
154.1Bright
164.0Bright
174.0Moderate
183.9Moderate
193.9Moderate
203.8Moderate
213.7Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.4Moderate
283.4Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Is September a good time to visit Genoa?

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

6.4
Sightseeing
4th-best month of the year
3.9
Beach & pool
4th-best month of the year

September is a reasonable time to visit Genoa for sightseeing.

What to pack for Genoa in September

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

In September, Genoa sees daytime highs around 21°C and nights near 15°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Genoa 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 3 to Oct 19 — 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 Genoa 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 Genoa 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery 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 Genoa 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 Genoa 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 Genoa?

Genoa sits at 44.4°N, 8.9°E, 19 m above sea level, in Italy. The nearest listed city is Rapallo, 23 km away.

Topography around Genoa

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

Within 3 km, the terrain around Genoa has significant variations in elevation — a maximum elevation change of 375 m around an average of 52 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,028 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,776 m.

The land around Genoa is covered by artificial surfaces (45%), water (32%) and trees (23%) within 3 km, water (47%) and trees (42%) within 16 km, and trees (52%) and water (26%) within 80 km.

3 km
375 m
16 km
1,028 m
80 km
1,776 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Rapallo 23 km · Portofino 24 km · Chiavari 32 km · Savona 39 km · Sestri Levante 39 km · Novi Ligure 42 km · Acqui Terme 48 km · Tortona 55 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 Genoa (44.4048°, 8.9444°, elevation 19 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).