Viareggio weather in September

In September, Viareggio sees average daytime highs of 23°C and overnight lows near 19°C, with 117 mm of rain across 10.1 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 21°C by the end. The sky is clear or mostly clear about 54% 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 Viareggio's 4th-clearest and 8th-windiest month. For the whole year in context, see Viareggio's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
19°
9th coldest
Rainfall
117 mm
10.1 wet days
Daylight
12 h 18 min
6:04 AM – 6:22 PM
Cloud cover
40%
4th clearest
Wind
10 km/h
8th windiest
Solar energy
4.49 kWh/m²
Travel score
7.0
out of 10

Viareggio is chief town of the homonym municipality.

Air quality
Moderate
PM2.5 14.1 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 24°C in the first days to 21°C by the end.

A typical September day in Viareggio reaches about 23°C in the afternoon and slips back to 19°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 25°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12521
22420
32420
42420
52420
62420
72420
82420
92420
102319
112319
122319
132319
142319
152319
162319
172319
182218
192218
202218
212218
222218
232218
242218
252218
262118
272117
282117
292117
302117

Viareggio weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan11° / 8911.20.59.12.5
Feb11° / 839.70.710.22.7
Mar13° / 779.60.211.63.8
Apr15° / 11°8311013.24.7
May19° / 15°679.5014.56.3
Jun23° / 19°547.4015.27.6
Jul25° / 21°295.3014.98.2
Aug26° / 22°436.5013.87.8
Sep23° / 19°11710.1012.37.0
Oct19° / 15°16212.7010.85.9
Nov15° / 11°171140.19.54.0
Dec12° / 12012.70.48.82.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% 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 28%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28317
38119
48119
58020
68020
77822
87822
97624
107525
117426
127228
137228
147129
157030
167030
176931
186931
196832
206832
216733
226832
236733
246733
256634
266634
276535
286436
296436
306238

Chance of precipitation in September

Any precipitation

Viareggio gets around 117 mm of rain over 10.1 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 34% and peaks near 40% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
128
229
329
429
529
630
730
831
931
1032
1132
1233
1334
1434
1535
1635
1736
1836
1937
2037
2137
2237
2338
2438
2538
2639
2739
2840
2940
3040

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 35% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
181732349
291832338
391933327
4101933316
5112034305
6122134304
7122135293
8132135282
9142136272
10142136271
11152137261
12162137251
13162137251
14172237240
15182237230
16182237220
17192336210
18202436200
19212435190
20222535180
21232635160
22242635150
23242735140
24252834120
25252934110
26263034100
2726313490
2827323380
2928333370
3028343260

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 5:47 AM to 6:21 AM, and sunset from 6:51 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:476:51
213.05:486:49
313.05:496:47
412.95:506:45
512.95:526:43
612.85:536:41
712.85:546:39
812.75:556:38
912.75:566:36
1012.65:576:34
1112.65:596:32
1212.56:006:30
1312.56:016:28
1412.46:026:26
1512.36:036:24
1612.36:046:22
1712.26:066:20
1812.26:076:18
1912.16:086:16
2012.16:096:15
2112.06:106:13
2212.06:116:11
2311.96:136:09
2411.96:146:07
2511.86:156:05
2611.86:166:03
2711.76:176:01
2811.76:195:59
2911.66:205:57
3011.66:215:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.49 kWh/m².

For context, solar energy here swings from a low near 1.41 kWh/m² to a high of 6.98 kWh/m² in July across the year — September's 4.49 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.2Bright
45.2Bright
55.1Bright
65.0Bright
75.0Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for Viareggio

In seasonPeak

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

Viareggio's rainy season runs September–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 Viareggio?

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
5.3
Beach & pool
4th-best month of the year

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

What to pack for Viareggio in September

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

In September, Viareggio sees daytime highs around 23°C and nights near 19°C. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

Sea temperature near Viareggio 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 1 to Oct 20 — about 4.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug25Warm
Sep23Refreshing
Oct20Refreshing
Nov18Cool
Dec16Cool

UV index in Viareggio 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 Viareggio peaks around July 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 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 13UV 9Jan 10UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5Moderate
Apr7High
May6High
Jun8Very high
Jul9Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Viareggio 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 Viareggio is worst in March — around 18 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Viareggio's WHO annual average of 14.1 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2017 µg/m³Nov 2311 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar18Moderate
Apr16Moderate
May16Moderate
Jun15Moderate
Jul14Moderate
Aug14Moderate
Sep13Moderate
Oct13Moderate
Nov11Good
Dec11Good
Location & terrain

Where is Viareggio?

Viareggio sits at 43.9°N, 10.3°E, 2 m above sea level, in Italy. The nearest listed city is Massarosa, 8.0 km away.

Topography around Viareggio

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

Within 3 km, the terrain around Viareggio has only modest variations in elevation — a maximum elevation change of 20 m around an average of 2 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,297 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,129 m.

The land around Viareggio is covered by water (34%) and artificial surfaces (31%) within 3 km, water (44%) and trees (37%) within 16 km, and trees (50%) and water (33%) within 80 km.

3 km
20 m
16 km
1,297 m
80 km
2,129 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Massarosa 8.0 km · Camaiore 9.0 km · Pietrasanta 10 km · Marina di Massa 19 km · Lucca 21 km · Massa 21 km · Pisa 21 km · Marina di Carrara 25 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 Viareggio (43.8669°, 10.2502°, elevation 2 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).