Campobasso weather in September

In September, Campobasso sees average daytime highs of 23°C and overnight lows near 14°C, with 56 mm of rain across 9.1 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 21°C by the end. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels dry.

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 Campobasso's 4th-clearest and 9th-windiest month. For the whole year in context, see Campobasso's year-round climate.

Daytime high
23°
4th warmest
Overnight low
14°
9th coldest
Rainfall
56 mm
9.1 wet days
Daylight
12 h 18 min
5:47 AM – 6:04 PM
Cloud cover
48%
4th clearest
Wind
8 km/h
9th windiest
Solar energy
4.43 kWh/m²
Travel score
7.1
out of 10
Air quality
Moderate
PM2.5 10.4 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 25°C in the first days to 21°C by the end.

A typical September day in Campobasso reaches about 23°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 27°C. Set against its neighbours, September runs about 5°C cooler than August and about 5°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12616
22616
32515
42515
52515
62515
72515
82415
92415
102414
112414
122414
132314
142314
152314
162314
172314
182313
192213
202213
212213
222213
232213
242213
252113
262112
272112
282112
292112
302112

How September really feels in Campobasso

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Campobasso weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 689.42.59.31.3
Feb / 649.82.910.31.6
Mar12° / 7711.7211.73.0
Apr15° / 7812.10.313.14.4
May20° / 11°6710.4014.36.3
Jun25° / 15°538014.97.4
Jul27° / 17°417.1014.77.3
Aug28° / 17°357.5013.77.0
Sep23° / 14°569.1012.37.1
Oct18° / 10°688.90.110.96.1
Nov13° / 82100.79.73.6
Dec / 7910.72.491.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27228
37030
47030
56931
66832
76733
86634
96634
106535
116436
126436
136337
146337
156337
166238
176238
186238
196139
206139
216139
226139
236139
246139
256040
266040
276040
285842
295842
305842

Chance of precipitation in September

Any precipitation

Campobasso gets around 56 mm of rain over 9.1 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 30% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
229
329
430
531
631
732
832
932
1032
1132
1232
1331
1431
1531
1631
1730
1830
1930
2030
2129
2229
2328
2428
2528
2628
2728
2828
2928
3028

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13044242
23145222
33245202
43346192
53547171
63648161
73748141
83749131
93849121
103949120
114048110
124148110
134247110
144346110
154445100
164644100
174742100
18494190
19514090
20533890
21553780
22563680
23583570
24593470
25613360
26633250
27643150
28653140
29663040
30673030

Wind in September

Winds average 8 km/h in September.

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

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
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 5:32 AM to 6:02 AM, and sunset from 6:30 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:326:30
212.95:336:29
312.95:346:27
412.85:356:25
512.85:366:23
612.75:376:22
712.75:386:20
812.75:396:18
912.65:406:16
1012.65:416:15
1112.55:426:13
1212.55:436:11
1312.45:446:09
1412.45:456:07
1512.35:466:06
1612.35:476:04
1712.25:486:02
1812.25:506:00
1912.15:515:58
2012.15:525:57
2112.05:535:55
2212.05:545:53
2311.95:555:51
2411.95:565:49
2511.85:575:48
2611.85:585:46
2711.75:595:44
2811.76:005:42
2911.76:015:41
3011.66:025:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.43 kWh/m².

For context, solar energy here swings from a low near 1.6 kWh/m² to a high of 6.81 kWh/m² in July across the year — September's 4.43 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.1Bright
234.1Bright
244.0Bright
254.0Bright
264.0Moderate
273.9Moderate
283.9Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Is September a good time to visit Campobasso?

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

7.1
Sightseeing
3rd-best month of the year
5.5
Beach & pool
4th-best month of the year

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

What to pack for Campobasso in September

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

In September, Campobasso sees daytime highs around 23°C and nights near 14°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Campobasso 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 at the nearest coast (about 65 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from May 31 to Oct 16 — about 4.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr14Bracing
May18Cool
Jun22Refreshing
Jul25Warm
Aug26Warm
Sep24Refreshing
Oct20Refreshing
Nov17Cool
Dec15Cool

UV index in Campobasso 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 Campobasso peaks around July 15 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 15UV 10Dec 20UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5High
Apr5Moderate
May7High
Jun9Very high
Jul10Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Campobasso?

Campobasso sits at 41.6°N, 14.7°E, 701 m above sea level, in Italy. The nearest listed city is Isernia, 36 km away.

Topography around Campobasso

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

Within 3 km, the terrain around Campobasso has significant variations in elevation — a maximum elevation change of 373 m around an average of 667 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 830 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,770 m.

The land around Campobasso is covered by trees (37%), artificial surfaces (27%) and grassland (20%) within 3 km, trees (48%) and cropland (29%) within 16 km, and trees (44%) and cropland (32%) within 80 km.

3 km
373 m
16 km
830 m
80 km
2,770 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Isernia 36 km · Benevento 49 km · Torremaggiore 54 km · San Salvo 54 km · Termoli 56 km · Lucera 56 km · Caserta 61 km · San Severo 61 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 Campobasso (41.5595°, 14.6674°, elevation 701 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).