Grottaglie weather in September

In September, Grottaglie sees average daytime highs of 26°C and overnight lows near 19°C, with 56 mm of rain across 7.2 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 24°C by the end. The sky is clear or mostly clear about 61% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Grottaglie's 4th-clearest and 10th-windiest month. For the whole year in context, see Grottaglie's year-round climate.

Daytime high
26°
4th warmest
Overnight low
19°
9th coldest
Rainfall
56 mm
7.2 wet days
Daylight
12 h 18 min
5:37 AM – 5:53 PM
Cloud cover
37%
4th clearest
Wind
10 km/h
10th windiest
Solar energy
4.86 kWh/m²
Travel score
7.4
out of 10

Grottaglie is chief town of the homonym municipality.

Air quality
Good
PM10 15.8 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 28°C in the first days to 24°C by the end.

A typical September day in Grottaglie reaches about 26°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 29°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°35°151015202530
Avg high (°C)Avg low (°C)
12921
22821
32820
42820
52820
62820
72720
82720
92720
102719
112719
122719
132619
142619
152619
162619
172619
182619
192618
202518
212518
222518
232518
242518
252518
262518
272417
282417
292417
302417

Grottaglie weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 568.69.43.4
Feb13° / 558.610.43.6
Mar15° / 60911.74.7
Apr18° / 11°548.4136.1
May22° / 15°386.214.27.6
Jun27° / 19°234.514.87.6
Jul30° / 22°152.914.66.4
Aug30° / 22°173.313.66.1
Sep26° / 19°567.212.37.4
Oct22° / 15°738.310.97.1
Nov17° / 12°8299.75.7
Dec13° / 618.89.24.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 61% 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 24%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18614
28416
38416
48218
58218
68020
78020
87822
97822
107723
117723
127624
137624
147525
157525
167525
177426
187525
197426
207426
217426
227327
237327
247327
257228
267228
277129
287129
297030
307030

Chance of precipitation in September

Any precipitation

Grottaglie gets around 56 mm of rain over 7.2 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 24% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
120
221
322
422
523
623
724
824
924
1024
1124
1224
1324
1424
1524
1624
1724
1824
1924
2024
2124
2224
2324
2424
2524
2625
2725
2825
2926
3026

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 32% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
151433408
261433397
361534387
471534387
571535376
671535366
781636355
881637355
981637345
1091637334
1191738334
1291738324
1391738324
14101838313
15101938303
16101938293
17112038283
18112137273
19122337263
20122437253
21132536233
22142636223
23142736212
24152735202
25152835192
26162935182
27162935182
28173035172
29173035161
30173035161

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
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 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 78 minutes over September. Sunrise moves from 5:22 AM to 5:51 AM, and sunset from 6:18 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:226:18
212.95:236:17
312.95:246:15
412.85:256:13
512.85:266:12
612.75:276:10
712.75:286:08
812.65:296:06
912.65:306:05
1012.55:316:03
1112.55:326:01
1212.45:335:59
1312.45:345:58
1412.45:355:56
1512.35:365:54
1612.35:375:53
1712.25:385:51
1812.25:395:49
1912.15:405:47
2012.15:415:46
2112.05:425:44
2212.05:435:42
2311.95:445:40
2411.95:455:39
2511.95:465:37
2611.85:475:35
2711.85:485:33
2811.75:495:32
2911.75:505:30
3011.65:515:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.86 kWh/m².

For context, solar energy here swings from a low near 1.82 kWh/m² to a high of 7.37 kWh/m² in June across the year — September's 4.86 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.2Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.6Bright
214.6Bright
224.5Bright
234.5Bright
244.4Bright
254.4Bright
264.3Bright
274.3Bright
284.3Bright
294.2Bright
304.2Bright
Planning a trip in September

Is September a good time to visit Grottaglie?

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

7.4
Sightseeing
3rd-best month of the year
7.2
Beach & pool
4th-best month of the year

September is one of the better times to visit Grottaglie for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Grottaglie in September

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

In September, Grottaglie sees daytime highs around 26°C and nights near 19°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near Grottaglie in September

The nearest coast averages about 25°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 19 km away) is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from May 29 to Nov 1 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Grottaglie in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Grottaglie peaks around July 17 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 17UV 10Dec 20UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7High
Jun9Very high
Jul10Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Grottaglie?

Grottaglie sits at 40.5°N, 17.4°E, 130 m above sea level, in Italy. The nearest listed city is Francavilla Fontana, 13 km away.

Topography around Grottaglie

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

Within 3 km, the terrain around Grottaglie has only modest variations in elevation — a maximum elevation change of 141 m around an average of 133 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 449 m; within 80 km, significant variations in elevation — a maximum elevation change of 522 m.

The land around Grottaglie is covered by trees (28%), grassland (28%) and cropland (21%) within 3 km, trees (37%), cropland (26%) and grassland (25%) within 16 km, and water (48%) within 80 km.

3 km
141 m
16 km
449 m
80 km
522 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Francavilla Fontana 13 km · Ceglie Messapica 14 km · Paolo VI 14 km · Sava 18 km · Taranto 18 km · Martina Franca 20 km · Manduria 23 km · Ostuni 24 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 Grottaglie (40.5369°, 17.4372°, elevation 130 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).