Vercelli weather in September

In September, Vercelli sees average daytime highs of 24°C and overnight lows near 15°C, with 114 mm of rain across 9.5 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 4th-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 43% 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 36 min by month's end. Set against the rest of the year, September is Vercelli's 3rd-clearest and 5th-windiest month. For the whole year in context, see Vercelli's year-round climate.

Daytime high
24°
4th warmest
Overnight low
15°
9th coldest
Rainfall
114 mm
9.5 wet days
Daylight
12 h 18 min
6:11 AM – 6:30 PM
Cloud cover
49%
3rd clearest
Wind
6 km/h
5th windiest
Solar energy
3.97 kWh/m²
Travel score
7.0
out of 10
Air quality
Elevated
PM2.5 18.4 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 27°C in the first days to 22°C by the end.

A typical September day in Vercelli reaches about 24°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 28°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12717
22717
32717
42617
52617
62617
72616
82616
92616
102516
112516
122516
132516
142515
152415
162415
172415
182415
192415
202315
212314
222314
232314
242314
252214
262214
272214
282213
292213
302113

How September really feels in Vercelli

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.

Vercelli weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°606.52.38.91.1
Feb10° / 616.51.710.12.4
Mar15° / 727.60.711.64.8
Apr18° / 10111.10.113.25.8
May23° / 14°11612.6014.66.4
Jun27° / 17°10111.3015.46.2
Jul30° / 20°759.9015.15.4
Aug29° / 19°9910.9013.95.7
Sep24° / 15°1149.5012.37.0
Oct18° / 11°1199.9010.75.7
Nov12° / 1439.90.39.33.1
Dec / 697.12.18.61.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% 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
26634
36634
46634
56535
66535
76535
86436
96436
106436
116436
126238
136238
146238
156040
166040
175941
185842
195743
205743
215644
225545
235545
245446
255347
265347
275248
285248
295050
305050

Chance of precipitation in September

Any precipitation

Vercelli gets around 114 mm of rain over 9.5 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 32% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
130
230
330
430
530
630
731
831
931
1032
1132
1232
1333
1433
1533
1634
1734
1834
1934
2034
2133
2233
2333
2433
2532
2632
2732
2833
2933
3033

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
126223517
227233515
328243414
430243412
531253311
632253310
73226329
83326328
93426327
103526327
113526326
123626326
133726315
143826315
153926305
164026295
174127284
184227274
194327264
204428254
214529233
224529223
234630213
244731202
254832182
264833172
274933161
285034151
295134141
305234131

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 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
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min 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 90 minutes over September. Sunrise moves from 5:53 AM to 6:29 AM, and sunset from 7:00 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:537:00
213.15:546:58
313.05:556:56
413.05:566:54
512.95:586:52
612.95:596:50
712.86:006:48
812.76:016:46
912.76:036:44
1012.66:046:42
1112.66:056:40
1212.56:066:38
1312.56:086:36
1412.46:096:34
1512.46:106:32
1612.36:116:30
1712.36:136:28
1812.26:146:26
1912.16:156:24
2012.16:166:22
2112.06:186:20
2212.06:196:18
2311.96:206:16
2411.96:216:14
2511.86:236:12
2611.86:246:10
2711.76:256:08
2811.76:266:06
2911.66:286:04
3011.66:296:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.97 kWh/m².

For context, solar energy here swings from a low near 1.21 kWh/m² to a high of 6.4 kWh/m² in July across the year — September's 3.97 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.4Bright
94.3Bright
104.3Bright
114.2Bright
124.2Bright
134.1Bright
144.0Bright
154.0Moderate
163.9Moderate
173.9Moderate
183.8Moderate
193.8Moderate
203.7Moderate
213.6Moderate
223.6Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.3Moderate
273.3Moderate
283.2Moderate
293.2Moderate
303.1Moderate
Planning a trip in September

Is September a good time to visit Vercelli?

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

7.0
Sightseeing
1st-best month of the year
5.8
Beach & pool
4th-best month of the year

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

What to pack for Vercelli in September

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

In September, Vercelli sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

UV index in Vercelli 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 Vercelli peaks around July 14 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 10 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 14UV 8Jan 10UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul8Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Vercelli 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 Vercelli is worst in January — around 23 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Vercelli's WHO annual average of 18.4 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1722 µg/m³Aug 1316 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb20Moderate
Mar23Moderate
Apr20Moderate
May17Moderate
Jun18Moderate
Jul16Moderate
Aug16Moderate
Sep16Moderate
Oct17Moderate
Nov17Moderate
Dec18Moderate
Location & terrain

Where is Vercelli?

Vercelli sits at 45.3°N, 8.4°E, 130 m above sea level, in Italy. The nearest listed city is Novara, 21 km away.

Topography around Vercelli

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

Within 3 km, the terrain around Vercelli has only modest variations in elevation — a maximum elevation change of 33 m around an average of 127 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 79 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,439 m.

The land around Vercelli is covered by cropland (48%) and artificial surfaces (29%) within 3 km, cropland (88%) within 16 km, and trees (40%) and cropland (33%) within 80 km.

3 km
33 m
16 km
79 m
80 km
4,439 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Novara 21 km · Casale Monferrato 21 km · Trecate 28 km · Galliate 28 km · Vigevano 34 km · Valenza 39 km · Biella 39 km · Magenta 40 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 Vercelli (45.3216°, 8.4199°, elevation 130 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).