Grumo Nevano weather in September

In September, Grumo Nevano sees average daytime highs of 25°C and overnight lows near 18°C, with 94 mm of rain across 9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 23°C by the end. The sky is clear or mostly clear about 56% 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 Grumo Nevano's 4th-clearest and 8th-windiest month. For the whole year in context, see Grumo Nevano's year-round climate.

Daytime high
25°
4th warmest
Overnight low
18°
9th coldest
Rainfall
94 mm
9 wet days
Daylight
12 h 18 min
5:49 AM – 6:05 PM
Cloud cover
41%
4th clearest
Wind
8 km/h
8th windiest
Solar energy
4.58 kWh/m²
Travel score
7.3
out of 10

Grumo Nevano 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 27°C in the first days to 23°C by the end.

A typical September day in Grumo Nevano reaches about 25°C in the afternoon and slips back to 18°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 28°C. Set against its neighbours, September runs about 4°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12720
22720
32719
42619
52619
62619
72619
82619
92619
102618
112518
122518
132518
142518
152518
162518
172518
182418
192417
202417
212417
222417
232417
242417
252317
262317
272316
282316
292316
302316

Grumo Nevano weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 109119.43.0
Feb12° / 10310.710.43.1
Mar14° / 10610.911.74.3
Apr17° / 10°9711.713.15.3
May21° / 14°648.414.36.9
Jun25° / 18°345.614.98.0
Jul28° / 21°19414.67.8
Aug28° / 21°234.213.67.2
Sep25° / 18°94912.37.3
Oct21° / 14°13510.510.96.6
Nov16° / 11°18013.49.74.8
Dec13° / 14112.49.13.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% 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 27%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28218
38218
48020
57921
67921
77723
87723
97525
107525
117426
127327
137327
147228
157129
167129
177129
187129
197030
207030
217030
226931
236931
246931
256832
266832
276733
286733
296733
306634

Chance of precipitation in September

Any precipitation

Grumo Nevano gets around 94 mm of rain over 9 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 30% and peaks near 32% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
123
224
325
426
527
627
728
829
929
1030
1130
1231
1331
1431
1532
1632
1732
1832
1932
2032
2132
2232
2332
2431
2531
2631
2731
2831
2931
3031

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 27% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1615304010
271631389
371732377
481733366
581834355
691934344
792035333
8102036323
9102136312
10102137302
11112137301
12112137291
13122237281
14122237271
15132337261
16142337251
17142437241
18152536231
19162536221
20172635211
21192735191
22202735181
23202834171
24212934160
25222934150
26223034140
27233133130
28233233110
29233333110
30233433100

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 5:34 AM to 6:04 AM, and sunset from 6:31 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:346:31
212.95:356:30
312.95:366:28
412.85:376:26
512.85:386:25
612.75:396:23
712.75:406:21
812.65:416:19
912.65:426:18
1012.55:436:16
1112.55:446:14
1212.55:456:12
1312.45:466:11
1412.45:476:09
1512.35:486:07
1612.35:496:05
1712.25:506:04
1812.25:516:02
1912.15:526:00
2012.15:535:58
2112.05:545:56
2212.05:555:55
2311.95:565:53
2411.95:575:51
2511.85:595:49
2611.86:005:48
2711.86:015:46
2811.76:025:44
2911.76:035:42
3011.66:045:41

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 1.68 kWh/m² to a high of 6.97 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
25.3Bright
35.3Bright
45.2Bright
55.1Bright
65.1Bright
75.0Bright
85.0Bright
94.9Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.6Bright
164.5Bright
174.5Bright
184.5Bright
194.4Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.0Bright
284.0Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Grumo Nevano

In seasonPeak

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

Grumo Nevano'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 Grumo Nevano?

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

7.3
Sightseeing
3rd-best month of the year
6.4
Beach & pool
4th-best month of the year

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

What to pack for Grumo Nevano in September

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

In September, Grumo Nevano sees daytime highs around 25°C and nights near 18°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Grumo Nevano in September

The nearest coast averages about 24°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 26°C and coldest in February near 14°C.

It's comfortable for a long swim from May 26 to Nov 7 — about 5.5 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb14Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun23Refreshing
Jul25Warm
Aug26Warm
Sep24Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Grumo Nevano 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 Grumo Nevano peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highHighModerateLowJul 16UV 9Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr4Moderate
May7High
Jun9Very high
Jul10Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Grumo Nevano 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 Grumo Nevano is worst in April — around 22 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1021 µg/m³Sep 1714 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb20Moderate
Mar21Moderate
Apr22Moderate
May18Moderate
Jun16Moderate
Jul16Moderate
Aug16Moderate
Sep14Moderate
Oct16Moderate
Nov16Moderate
Dec17Moderate
Location & terrain

Where is Grumo Nevano?

Grumo Nevano sits at 40.9°N, 14.3°E, 53 m above sea level, in Italy. The nearest listed city is Frattamaggiore, 1.0 km away.

Topography around Grumo Nevano

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

Within 3 km, the terrain around Grumo Nevano has only modest variations in elevation — a maximum elevation change of 74 m around an average of 59 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 630 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,032 m.

The land around Grumo Nevano is covered by artificial surfaces (68%) within 3 km, artificial surfaces (37%), cropland (28%) and trees (21%) within 16 km, and water (40%) and trees (37%) within 80 km.

3 km
74 m
16 km
630 m
80 km
2,032 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Frattamaggiore 1.0 km · Sant'Antimo 2.0 km · Frattaminore 2.0 km · Arzano 3.0 km · Melito di Napoli 3.0 km · Orta di Atella 3.0 km · Cardito 4.0 km · Secondigliano 4.0 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 Grumo Nevano (40.9359°, 14.2598°, elevation 53 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).