Cassino weather in September

In September, Cassino sees average daytime highs of 24°C and overnight lows near 13°C, with 95 mm of rain across 9.8 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 26°C in the first days to 22°C by the end. The sky is clear or mostly clear about 46% of the time in September, and the air most often feels comfortable.

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 Cassino's 4th-clearest and 10th-windiest month. For the whole year in context, see Cassino's year-round climate.

Daytime high
24°
4th warmest
Overnight low
13°
9th coldest
Rainfall
95 mm
9.8 wet days
Daylight
12 h 18 min
5:51 AM – 6:07 PM
Cloud cover
46%
4th clearest
Wind
5 km/h
10th windiest
Solar energy
4.53 kWh/m²
Travel score
7.0
out of 10
Air quality
Elevated
PM2.5 21.2 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 26°C in the first days to 22°C by the end.

A typical September day in Cassino reaches about 24°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 27°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)
12615
22615
32615
42615
52515
62515
72514
82514
92514
102514
112514
122414
132414
142414
152414
162413
172413
182313
192313
202313
212313
222313
232313
242312
252212
262212
272212
282212
292212
302212

How September really feels in Cassino

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.

Cassino 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 daysSnow daysDaylight (hours)Travel score
Jan10° / 999.81.29.32.2
Feb11° / 10610.71.310.32.5
Mar13° / 11011.2111.73.8
Apr16° / 11313.40.213.14.8
May21° / 10°8711.6014.36.3
Jun25° / 14°508.6014.97.4
Jul28° / 17°336.3014.77.3
Aug28° / 17°275.9013.77.1
Sep24° / 13°959.8012.37.0
Oct20° / 10°14410.7010.96.3
Nov14° / 19212.90.39.74.0
Dec11° / 14411.40.89.12.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27921
37822
47624
57525
67327
77327
87129
97030
107030
116832
126832
136832
146634
156634
166634
176634
186634
196634
206535
216535
226535
236535
246436
256436
266436
276337
286436
296337
306238

Chance of precipitation in September

Any precipitation

Cassino gets around 95 mm of rain over 9.8 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 33% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
128
228
329
430
531
631
732
832
933
1033
1134
1234
1335
1435
1535
1636
1736
1836
1936
2035
2135
2235
2334
2434
2534
2633
2733
2833
2933
3034

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 38% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
118324110
21933399
32134387
42236366
52337346
62538335
72639314
82740304
92841283
102941273
112942263
123042252
133142252
143242242
153342232
163442222
173641212
183841201
194040191
204139191
214338181
224537171
234736171
244835161
255034151
265134150
275333140
285433130
295632120
305632120

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:35 AM to 6:06 AM, and sunset from 6:34 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:356:34
212.95:366:32
312.95:376:30
412.85:386:28
512.85:396:27
612.75:406:25
712.75:416:23
812.75:426:21
912.65:436:20
1012.65:456:18
1112.55:466:16
1212.55:476:14
1312.45:486:13
1412.45:496:11
1512.35:506:09
1612.35:516:07
1712.25:526:05
1812.25:536:04
1912.15:546:02
2012.15:556:00
2112.05:565:58
2212.05:575:56
2311.95:585:55
2411.95:595:53
2511.86:005:51
2611.86:015:49
2711.86:025:48
2811.76:045:46
2911.76:055:44
3011.66:065:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.53 kWh/m².

For context, solar energy here swings from a low near 1.68 kWh/m² to a high of 6.92 kWh/m² in July across the year — September's 4.53 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.2Bright
45.1Bright
55.1Bright
65.0Bright
75.0Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.5Bright
164.5Bright
174.4Bright
184.4Bright
194.3Bright
204.3Bright
214.3Bright
224.2Bright
234.2Bright
244.1Bright
254.1Bright
264.0Bright
274.0Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Is September a good time to visit Cassino?

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
5.8
Beach & pool
4th-best month of the year

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

What to pack for Cassino in September

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

In September, Cassino sees daytime highs around 24°C and nights near 13°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Cassino 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 40 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 27 to Nov 5 — about 5.4 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug26Warm
Sep24Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Cassino 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 Cassino peaks around July 16 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highVery highHighModerateLowJul 16UV 10Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5High
Apr5Moderate
May7Very high
Jun9Very high
Jul10Extreme
Aug9Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Cassino 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 Cassino is worst in March — around 26 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Cassino's WHO annual average of 21.2 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2326 µg/m³Dec 1217 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb22Moderate
Mar26Moderate
Apr26Moderate
May23Moderate
Jun21Moderate
Jul20Moderate
Aug23Moderate
Sep19Moderate
Oct20Moderate
Nov18Moderate
Dec17Moderate
Location & terrain

Where is Cassino?

Cassino sits at 41.5°N, 13.8°E, 40 m above sea level, in Italy. The nearest listed city is Minturno, 26 km away.

Topography around Cassino

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

Within 3 km, the terrain around Cassino has significant variations in elevation — a maximum elevation change of 568 m around an average of 122 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,649 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,771 m.

The land around Cassino is covered by trees (45%) within 3 km, trees (59%) within 16 km, and trees (49%) within 80 km.

3 km
568 m
16 km
1,649 m
80 km
2,771 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Minturno 26 km · Formia 31 km · Sora 31 km · Isernia 36 km · Fondi 36 km · Gaeta 37 km · Mondragone 42 km · Frosinone 44 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 Cassino (41.4858°, 13.8284°, elevation 40 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).