Piombino weather in September

In September, Piombino sees average daytime highs of 23°C and overnight lows near 20°C, with 73 mm of rain across 7.4 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 60% of the time in September, and the air most often feels humid.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Piombino's 4th-clearest and 8th-windiest month. For the whole year in context, see Piombino's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
73 mm
7.4 wet days
Daylight
12 h 18 min
6:04 AM – 6:21 PM
Cloud cover
36%
4th clearest
Wind
15 km/h
8th windiest
Solar energy
4.58 kWh/m²
Travel score
7.6
out of 10
Air quality
Good
PM10 17.1 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 Piombino reaches about 23°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 21°C and 25°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)
12422
22422
32422
42422
52422
62422
72421
82421
92321
102321
112321
122321
132321
142321
152321
162320
172320
182220
192220
202220
212220
222220
232220
242219
252219
262219
272119
282119
292119
302119

Piombino 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 daysDaylight (hours)Travel score
Jan12° / 679.49.23.1
Feb12° / 628.510.23.1
Mar13° / 11°537.611.64.0
Apr15° / 13°558.413.14.9
May19° / 16°396.114.46.8
Jun22° / 20°26415.18.2
Jul25° / 23°14214.89.1
Aug25° / 23°19313.88.6
Sep23° / 20°737.412.37.6
Oct19° / 17°10310.110.86.4
Nov16° / 14°130139.54.6
Dec13° / 11°9411.38.93.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% 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 (%)
18317
28317
38218
48218
58119
68020
77921
87921
97822
107723
117624
127624
137525
147426
157327
167327
177327
187228
197228
207228
217129
227129
237129
247129
257030
267030
277030
286832
296832
306832

Chance of precipitation in September

Any precipitation

Piombino gets around 73 mm of rain over 7.4 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 25% and peaks near 30% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
117
218
318
419
519
620
721
822
922
1023
1124
1225
1325
1426
1526
1627
1728
1828
1928
2029
2129
2229
2329
2429
2529
2629
2729
2830
2930
3030

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 33% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1614283418
2715283416
3816293314
4816303312
5917303311
691831339
7101831338
8111831337
9111831336
10121831345
11121831344
12131830344
13141930343
14141930343
15151930333
16162030332
17172030322
18172130302
19182130292
20192230271
21202231261
22212331241
23222332231
24222433211
25222434191
26232534180
27232635160
28232635150
29242735140
30242835130

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 5:47 AM to 6:20 AM, and sunset from 6:48 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:476:48
213.05:486:47
312.95:496:45
412.95:506:43
512.85:516:41
612.85:526:39
712.75:546:38
812.75:556:36
912.65:566:34
1012.65:576:32
1112.55:586:30
1212.55:596:28
1312.46:006:26
1412.46:016:25
1512.36:026:23
1612.36:046:21
1712.26:056:19
1812.26:066:17
1912.16:076:15
2012.16:086:13
2112.06:096:11
2212.06:106:10
2311.96:126:08
2411.96:136:06
2511.86:146:04
2611.86:156:02
2711.76:166:00
2811.76:175:59
2911.66:185:57
3011.66:205:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 1.56 kWh/m² to a high of 7.12 kWh/m² in July across the year — September's 4.58 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.3Bright
45.2Bright
55.2Bright
65.1Bright
75.0Bright
85.0Bright
94.9Bright
104.9Bright
114.8Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.5Bright
174.5Bright
184.4Bright
194.3Bright
204.3Bright
214.3Bright
224.2Bright
234.2Bright
244.1Bright
254.0Bright
264.0Bright
274.0Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Piombino

In seasonPeak

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

Piombino's rainy season runs September–February, 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 Piombino?

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

7.6
Sightseeing
4th-best month of the year
5.7
Beach & pool
4th-best month of the year

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

What to pack for Piombino in September

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

In September, Piombino sees daytime highs around 23°C and nights near 20°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near Piombino 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 14°C.

It's comfortable for a long swim from Jun 3 to Oct 26 — about 4.8 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct21Refreshing
Nov18Cool
Dec16Cool

UV index in Piombino 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 Piombino peaks around July 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 9Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5Moderate
Apr5High
May6High
Jun8Very high
Jul9Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Piombino?

Piombino sits at 42.9°N, 10.5°E, 21 m above sea level, in Italy. The nearest listed city is Follonica, 19 km away.

LivornoColle di Val d'ElsaSienaPoggibonsi

Topography around Piombino

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

Within 3 km, the terrain around Piombino has only modest variations in elevation — a maximum elevation change of 207 m around an average of 20 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 418 m; within 80 km, large variations in elevation — a maximum elevation change of 1,166 m.

The land around Piombino is covered by water (62%) within 3 km, water (74%) within 16 km, and water (61%) and trees (22%) within 80 km.

3 km
207 m
16 km
418 m
80 km
1,166 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Follonica 19 km · Cecina 42 km · Grosseto 51 km · Rosignano Solvay-Castiglioncello 52 km · Livorno 71 km · Colle di Val d'Elsa 74 km · Siena 79 km · Poggibonsi 79 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 Piombino (42.9255°, 10.5259°, elevation 21 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).