Treviso weather in September

In September, Treviso sees average daytime highs of 24°C and overnight lows near 15°C, with 120 mm of rain across 9.9 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 26°C in the first days to 21°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 Treviso's 3rd-clearest and 4th-windiest month. For the whole year in context, see Treviso's year-round climate.

Daytime high
24°
4th warmest
Overnight low
15°
9th coldest
Rainfall
120 mm
9.9 wet days
Daylight
12 h 18 min
5:56 AM – 6:15 PM
Cloud cover
50%
3rd clearest
Wind
6 km/h
4th windiest
Solar energy
3.87 kWh/m²
Travel score
6.9
out of 10
Air quality
Elevated
PM2.5 20.3 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 21°C by the end.

A typical September day in Treviso 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)
12617
22617
32617
42617
52617
62516
72516
82516
92516
102516
112516
122416
132415
142415
152415
162415
172315
182315
192315
202314
212314
222214
232214
242214
252214
262214
272214
282113
292113
302113

How September really feels in Treviso

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.

Treviso 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 / 606.81.18.91.2
Feb / 596.9110.12.1
Mar14° / 799.30.511.64.1
Apr18° / 10011.7013.35.4
May22° / 14°11412014.76.4
Jun26° / 17°8910.8015.46.6
Jul29° / 19°678.8015.16.1
Aug29° / 19°819013.96.1
Sep24° / 15°1209.9012.36.9
Oct18° / 11°12610.1010.75.8
Nov12° / 14110.50.39.33.3
Dec / 827.418.61.4

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
46634
56634
66535
76535
86535
96535
106436
116436
126436
136337
146238
156139
166139
176040
185941
195842
205743
215545
225545
235446
245248
255149
265149
274951
284951
294852
304753

Chance of precipitation in September

Any precipitation

Treviso gets around 120 mm of rain over 9.9 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 34% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
233
333
433
533
634
734
834
934
1034
1134
1234
1333
1433
1533
1633
1733
1833
1933
2033
2133
2233
2333
2434
2534
2634
2735
2835
2936
3036

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
118273917
219283815
321283714
422293613
523303512
624303412
725313411
826313310
92731339
102731339
112831338
123031328
133131327
143231316
153332306
163432295
173532284
183633274
193733263
203834253
213934243
224035232
234135222
244136212
254236202
264336191
274437191
284436181
294536181
304636171

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 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 5:37 AM to 6:14 AM, and sunset from 6:45 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:376:45
213.15:386:43
313.05:396:41
413.05:416:39
512.95:426:37
612.95:436:35
712.85:446:33
812.85:466:31
912.75:476:29
1012.65:486:27
1112.65:506:25
1212.55:516:23
1312.55:526:21
1412.45:536:19
1512.45:556:17
1612.35:566:15
1712.35:576:13
1812.25:586:11
1912.26:006:09
2012.16:016:07
2112.06:026:05
2212.06:046:03
2311.96:056:01
2411.96:065:59
2511.86:075:57
2611.86:095:55
2711.76:105:53
2811.76:115:51
2911.66:135:49
3011.56:145:47

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.87 kWh/m².

For context, solar energy here swings from a low near 1.22 kWh/m² to a high of 6.15 kWh/m² in July across the year — September's 3.87 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.5Bright
44.5Bright
54.4Bright
64.4Bright
74.3Bright
84.3Bright
94.2Bright
104.2Bright
114.1Bright
124.0Bright
134.0Moderate
143.9Moderate
153.9Moderate
163.8Moderate
173.8Moderate
183.7Moderate
193.6Moderate
203.6Moderate
213.5Moderate
223.5Moderate
233.4Moderate
243.4Moderate
253.3Moderate
263.3Moderate
273.2Moderate
283.2Moderate
293.1Moderate
303.1Moderate
Planning a trip in September

Is September a good time to visit Treviso?

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

6.9
Sightseeing
1st-best month of the year
5.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Treviso for sightseeing.

What to pack for Treviso in September

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

In September, Treviso 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

Sea temperature near Treviso in September

The nearest coast averages about 23°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 34 km away) is warmest in August at about 26°C and coldest in February near 9°C.

It's comfortable for a long swim from May 28 to Oct 7 — about 4.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb9Bracing
Mar10Bracing
Apr14Bracing
May18Cool
Jun23Refreshing
Jul25Warm
Aug26Warm
Sep23Refreshing
Oct19Cool
Nov16Cool
Dec13Bracing

UV index in Treviso 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 Treviso peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. 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 15UV 8Jan 10UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr7High
May7High
Jun8Very high
Jul8Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Treviso 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 Treviso is worst in January — around 26 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (September, 15 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Treviso's WHO annual average of 20.3 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 1725 µg/m³Sep 1416 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb23Moderate
Mar25Moderate
Apr23Moderate
May19Moderate
Jun20Moderate
Jul19Moderate
Aug17Moderate
Sep15Moderate
Oct18Moderate
Nov18Moderate
Dec22Moderate
Location & terrain

Where is Treviso?

Treviso sits at 45.7°N, 12.2°E, 15 m above sea level, in Italy. The nearest listed city is Lancenigo-Villorba, 5.0 km away.

Topography around Treviso

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

Within 3 km, the terrain around Treviso has only modest variations in elevation — a maximum elevation change of 26 m around an average of 16 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 153 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,164 m.

The land around Treviso is covered by artificial surfaces (42%) and trees (25%) within 3 km, cropland (40%) and grassland (32%) within 16 km, and cropland (28%), trees (27%) and water (20%) within 80 km.

3 km
26 m
16 km
153 m
80 km
3,164 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Lancenigo-Villorba 5.0 km · Mogliano Veneto 12 km · Montebelluna 19 km · Mestre 19 km · Spinea-Orgnano 21 km · Mirano 22 km · Oderzo 23 km · Marghera 24 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 Treviso (45.6667°, 12.2416°, elevation 15 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).