Assisi weather in September

In September, Assisi sees average daytime highs of 24°C and overnight lows near 14°C, with 82 mm of rain across 9.1 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 22°C by the end. The sky is clear or mostly clear about 47% 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 Assisi's 4th-clearest and 7th-windiest month. For the whole year in context, see Assisi's year-round climate.

Daytime high
24°
4th warmest
Overnight low
14°
9th coldest
Rainfall
82 mm
9.1 wet days
Daylight
12 h 18 min
5:55 AM – 6:13 PM
Cloud cover
44%
4th clearest
Wind
8 km/h
7th windiest
Solar energy
4.39 kWh/m²
Travel score
7.1
out of 10

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 22°C by the end.

A typical September day in Assisi reaches about 24°C in the afternoon and slips back to 14°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 29°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)
12716
22716
32715
42715
52615
62615
72615
82615
92614
102514
112514
122514
132514
142514
152414
162414
172413
182413
192413
202313
212313
222313
232313
242313
252212
262212
272212
282212
292212
302212

How September really feels in Assisi

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.

Assisi weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 619.41.49.21.6
Feb10° / 709.61.410.22.1
Mar13° / 7710111.63.8
Apr17° / 7811.40.213.15.3
May22° / 11°699.9014.46.7
Jun26° / 15°487.8015.17.2
Jul30° / 18°314.7014.96.4
Aug29° / 17°416.9013.86.2
Sep24° / 14°829.1012.37.1
Oct19° / 10°809.3010.86.4
Nov14° / 10311.40.39.53.7
Dec / 8510.718.91.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27624
37426
47426
57228
67228
77129
87030
96931
106832
116832
126634
136634
146535
156535
166535
176436
186436
196436
206436
216337
226337
236337
246337
256436
266436
276436
286436
296337
306337

Chance of precipitation in September

Any precipitation

Assisi gets around 82 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 31% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
126
226
327
427
527
628
728
829
929
1030
1131
1231
1332
1433
1533
1634
1734
1834
1935
2035
2134
2234
2333
2433
2532
2632
2731
2831
2931
3030

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 54% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13641221
23841201
33941191
44141171
54341161
64440151
74540141
84740131
94839130
104939120
114938120
125137120
135236120
145335120
155434120
165533120
175632120
185831110
195831110
205930110
216129100
226228100
23632890
24642790
25652780
26672670
27672670
28692560
29692560
30702550

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
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 5:38 AM to 6:11 AM, and sunset from 6:40 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:386:40
213.05:396:38
312.95:416:37
412.95:426:35
512.85:436:33
612.85:446:31
712.75:456:29
812.75:466:27
912.65:476:26
1012.65:486:24
1112.55:506:22
1212.55:516:20
1312.45:526:18
1412.45:536:16
1512.35:546:14
1612.35:556:13
1712.25:566:11
1812.25:576:09
1912.15:596:07
2012.16:006:05
2112.06:016:03
2212.06:026:01
2311.96:035:59
2411.96:045:58
2511.86:055:56
2611.86:075:54
2711.76:085:52
2811.76:095:50
2911.66:105:48
3011.66:115:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.39 kWh/m².

For context, solar energy here swings from a low near 1.42 kWh/m² to a high of 6.94 kWh/m² in July across the year — September's 4.39 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
64.9Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.6Bright
124.5Bright
134.5Bright
144.4Bright
154.4Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Moderate
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Assisi?

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

7.1
Sightseeing
2nd-best month of the year
6.0
Beach & pool
4th-best month of the year

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

What to pack for Assisi in September

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

In September, Assisi sees daytime highs around 24°C and nights near 14°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Assisi 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 Assisi peaks around July 15 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 15UV 9Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5High
Apr6High
May7High
Jun8Very high
Jul10Very high
Aug8Very high
Sep5High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Assisi 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 Assisi is worst in April — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateGoodGoodModerateApr 1017 µg/m³Sep 1712 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb15Moderate
Mar17Moderate
Apr17Moderate
May15Moderate
Jun14Moderate
Jul11Good
Aug13Moderate
Sep11Good
Oct12Moderate
Nov12Good
Dec12Moderate
Location & terrain

Where is Assisi?

Assisi sits at 43.1°N, 12.6°E, 0 m above sea level, in Italy. The nearest listed city is Bastia umbra, 6.0 km away.

Topography around Assisi

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

Within 3 km, the terrain around Assisi has large variations in elevation — a maximum elevation change of 934 m around an average of 414 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,122 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,434 m.

The land around Assisi is covered by trees (53%) and cropland (21%) within 3 km, trees (52%) and cropland (26%) within 16 km, and trees (60%) and cropland (24%) within 80 km.

3 km
934 m
16 km
1,122 m
80 km
2,434 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Bastia umbra 6.0 km · Foligno 14 km · Perugia 20 km · Todi 36 km · Spoleto 37 km · Fabriano 38 km · Città di Castello 54 km · Terni 56 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 Assisi (43.0667°, 12.6211°, elevation 0 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. 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).