Chiavari weather in September

In September, Chiavari sees average daytime highs of 22°C and overnight lows near 20°C, with 108 mm of rain across 8.8 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 5th-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 Chiavari's 3rd-clearest and 8th-windiest month. For the whole year in context, see Chiavari's year-round climate.

Daytime high
22°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
108 mm
8.8 wet days
Daylight
12 h 18 min
6:08 AM – 6:26 PM
Cloud cover
40%
3rd clearest
Wind
12 km/h
8th windiest
Solar energy
4.22 kWh/m²
Travel score
7.0
out of 10

Chiavari is chief town of the homonym municipality.

Air quality
Good
PM10 17.2 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 23°C in the first days to 20°C by the end.

A typical September day in Chiavari 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 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12321
22321
32321
42321
52321
62321
72321
82220
92220
102220
112220
122220
132220
142220
152220
162219
172119
182119
192119
202119
212119
222119
232119
242119
252118
262018
272018
282018
292018
302018

Chiavari weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan11° / 12512.20.29.12.4
Feb11° / 10110.70.510.22.4
Mar12° / 10°10110.50.211.63.3
Apr14° / 12°9110.5013.24.2
May18° / 16°678.8014.56.0
Jun21° / 19°477015.37.3
Jul24° / 22°264.10158.4
Aug24° / 22°406013.88.1
Sep22° / 20°1088.8012.37.0
Oct18° / 16°18513.3010.85.6
Nov14° / 12°20514.309.43.9
Dec12° / 10°15113.70.28.72.8

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
57723
67624
77624
87624
97426
107426
117426
127228
137228
147129
157129
167030
176931
186931
196832
206733
216733
226634
236634
246535
256535
266436
276337
286337
296238
306238

Chance of precipitation in September

Any precipitation

Chiavari gets around 108 mm of rain over 8.8 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 31% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
123
223
323
423
523
624
724
825
926
1026
1127
1228
1329
1430
1531
1631
1732
1833
1934
2034
2135
2235
2336
2437
2537
2638
2739
2840
2941
3041

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 16% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1101738324
2101838303
3111939283
4112040262
5122140252
6122241231
7132341221
8142342211
9142342200
10152343190
11152343180
12162443170
13172443160
14172443160
15182542150
16192542140
17202641130
18212740130
19222839120
20232838110
21242937100
2225303690
2325313580
2426323570
2526333460
2627343360
2728353250
2829353240
2930363140
3031363030

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
1512calm
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2313light 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 5:50 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)
113.15:506:55
213.05:516:53
313.05:526:51
412.95:546:49
512.95:556:47
612.85:566:45
712.85:576:43
812.75:586:42
912.76:006:40
1012.66:016:38
1112.66:026:36
1212.56:036:34
1312.56:046:32
1412.46:066:30
1512.46:076:28
1612.36:086:26
1712.26:096:24
1812.26:106:22
1912.16:126:20
2012.16:136:18
2112.06:146:16
2212.06:156:14
2311.96:166:12
2411.96:186:11
2511.86:196:09
2611.86:206:07
2711.76:216:05
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 4.22 kWh/m².

For context, solar energy here swings from a low near 1.35 kWh/m² to a high of 6.57 kWh/m² in July across the year — September's 4.22 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.4Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.1Bright
184.0Bright
194.0Bright
204.0Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.6Moderate
273.6Moderate
283.5Moderate
293.5Moderate
303.4Moderate
Planning a trip in September

Hazard calendar for Chiavari

In seasonPeak

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

Chiavari'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 Chiavari?

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
4.6
Beach & pool
4th-best month of the year

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

What to pack for Chiavari in September

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

In September, Chiavari 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 Chiavari 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 17 km away) 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 Chiavari 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 Chiavari 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 Chiavari 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 Chiavari 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 Chiavari?

Chiavari sits at 44.3°N, 9.3°E, 5 m above sea level, in Italy. The nearest listed city is Sestri Levante, 8.0 km away.

Novi Ligure

Topography around Chiavari

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

Within 3 km, the terrain around Chiavari has significant variations in elevation — a maximum elevation change of 435 m around an average of 54 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,405 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,980 m.

The land around Chiavari is covered by water (43%) and trees (41%) within 3 km, trees (52%) and water (42%) within 16 km, and trees (53%) and water (31%) within 80 km.

3 km
435 m
16 km
1,405 m
80 km
1,980 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Sestri Levante 8.0 km · Rapallo 8.0 km · Portofino 9.0 km · Genoa 32 km · Cinque Terre 40 km · La Spezia 47 km · Sarzana 56 km · Novi Ligure 65 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 Chiavari (44.3177°, 9.3224°, elevation 5 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).