Cantù weather in September

In September, Cantù sees average daytime highs of 21°C and overnight lows near 14°C, with 149 mm of rain across 11 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 23°C in the first days to 19°C by the end. The sky is clear or mostly clear about 41% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Cantù's 5th-clearest and 10th-windiest month. For the whole year in context, see Cantù's year-round climate.

Daytime high
21°
4th warmest
Overnight low
14°
9th coldest
Rainfall
149 mm
11 wet days
Daylight
12 h 18 min
6:08 AM – 6:27 PM
Cloud cover
51%
5th clearest
Wind
5 km/h
10th windiest
Solar energy
3.8 kWh/m²
Travel score
6.4
out of 10

Cantù is chief town of the homonym municipality.

Air quality
Good
PM10 22.4 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 23°C in the first days to 19°C by the end.

A typical September day in Cantù reaches about 21°C in the afternoon and slips back to 14°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 25°C. Set against its neighbours, September runs about 5°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12416
22416
32316
42316
52315
62315
72315
82315
92215
102215
112215
122214
132214
142214
152114
162114
172114
182114
192114
202013
212013
222013
232013
242013
252013
261913
271913
281912
291912
301912

How September really feels in Cantù

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.

Cantù 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 / -0°626.93.98.90.6
Feb / 627.23.710.11.5
Mar12° / 829.22.111.63.5
Apr16° / 12013.20.813.34.6
May20° / 12°13715.20.114.75.6
Jun24° / 16°14513.5015.46.4
Jul27° / 18°11613015.16.4
Aug26° / 18°14213.6013.96.4
Sep21° / 14°14911012.36.4
Oct16° / 10°15611.20.210.74.8
Nov11° / 160111.19.32.4
Dec / 787.538.50.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16535
26535
36634
46535
56535
66535
76535
86436
96436
106436
116337
126238
136238
146238
156040
166040
175941
185842
195743
205743
215545
225545
235446
245347
255347
265248
275149
285050
295050
304951

Chance of precipitation in September

Any precipitation

Cantù gets around 149 mm of rain over 11 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 38% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
238
338
438
537
637
737
837
937
1037
1137
1237
1338
1438
1538
1638
1738
1838
1938
2038
2138
2238
2337
2437
2537
2637
2738
2838
2938
3039

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 49% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13231343
23431323
33532302
43733282
53833272
63934252
74034241
84135231
94235221
104335211
114435201
124535191
134535181
144735180
154835170
164935160
175035150
185135140
195235130
205335120
215534110
22573490
23583480
24593470
25613360
26613360
27633250
28643240
29653140
30673030

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 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
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 h 06 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over September. Sunrise moves from 5:49 AM to 6:26 AM, and sunset from 6:57 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:496:57
213.15:506:55
313.05:526:53
413.05:536:51
512.95:546:49
612.95:566:47
712.85:576:45
812.85:586:43
912.75:596:41
1012.66:016:39
1112.66:026:37
1212.56:036:35
1312.56:046:33
1412.46:066:31
1512.46:076:29
1612.36:086:27
1712.36:106:25
1812.26:116:23
1912.26:126:21
2012.16:136:19
2112.06:156:17
2212.06:166:15
2311.96:176:13
2411.96:196:11
2511.86:206:09
2611.86:216:07
2711.76:226:05
2811.76:246:03
2911.66:256:01
3011.56:265:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.8 kWh/m².

For context, solar energy here swings from a low near 1.26 kWh/m² to a high of 6.11 kWh/m² in July across the year — September's 3.8 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.5Bright
34.5Bright
44.4Bright
54.4Bright
64.3Bright
74.3Bright
84.2Bright
94.2Bright
104.1Bright
114.0Bright
124.0Moderate
133.9Moderate
143.9Moderate
153.8Moderate
163.8Moderate
173.7Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.4Moderate
233.4Moderate
243.3Moderate
253.3Moderate
263.2Moderate
273.2Moderate
283.1Moderate
293.0Moderate
303.0Moderate
Planning a trip in September

Is September a good time to visit Cantù?

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

6.4
Sightseeing
1st-best month of the year
4.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Cantù for sightseeing.

What to pack for Cantù in September

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

In September, Cantù sees daytime highs around 21°C and nights near 14°C. Worth packing: rain gear. About 11 days see rain.

rain gear

UV index in Cantù 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 Cantù peaks around July 15 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May7High
Jun7Very high
Jul8Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Cantù 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 Cantù is worst in March — around 21 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2221 µg/m³Nov 1414 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb17Moderate
Mar21Moderate
Apr20Moderate
May17Moderate
Jun20Moderate
Jul17Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov14Moderate
Dec15Moderate
Location & terrain

Where is Cantù?

Cantù sits at 45.7°N, 9.1°E, 369 m above sea level, in Italy. The nearest listed city is Mariano Comense, 6.0 km away.

Topography around Cantù

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

Within 3 km, the terrain around Cantù has only modest variations in elevation — a maximum elevation change of 205 m around an average of 343 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,253 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,531 m.

The land around Cantù is covered by trees (50%) and artificial surfaces (28%) within 3 km, trees (49%) and artificial surfaces (25%) within 16 km, and trees (45%) and cropland (26%) within 80 km.

3 km
205 m
16 km
1,253 m
80 km
3,531 m
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewater
September weather nearby: Mariano Comense 6.0 km · Giussano 8.0 km · Como 8.0 km · Meda 9.0 km · Seveso 11 km · Erba 11 km · Carate Brianza 11 km · Seregno 12 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 Cantù (45.741°, 9.1308°, elevation 369 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).