Udine weather in September

In September, Udine sees average daytime highs of 23°C and overnight lows near 15°C, with 153 mm of rain across 11.1 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 26°C in the first days to 21°C by the end. The sky is clear or mostly clear about 39% 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 Udine's 3rd-clearest and 8th-windiest month. For the whole year in context, see Udine's year-round climate.

Daytime high
23°
4th warmest
Overnight low
15°
9th coldest
Rainfall
153 mm
11.1 wet days
Daylight
12 h 18 min
5:52 AM – 6:11 PM
Cloud cover
51%
3rd clearest
Wind
6 km/h
8th windiest
Solar energy
3.85 kWh/m²
Travel score
6.7
out of 10
Air quality
Moderate
PM2.5 14.5 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 Udine reaches about 23°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 19°C and 28°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)
12617
22617
32616
42516
52516
62516
72516
82516
92415
102415
112415
122415
132415
142415
152315
162315
172314
182314
192314
202214
212214
222214
232214
242213
252213
262113
272113
282113
292113
302113

How September really feels in Udine

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.

Udine 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 / 7581.68.91.2
Feb / 807.52102.0
Mar13° / 939.3111.63.8
Apr17° / 10411.80.413.35.3
May22° / 13°11513014.76.3
Jun26° / 17°9712.1015.56.5
Jul28° / 19°7810.2015.26.1
Aug28° / 19°969.80146.0
Sep23° / 15°15311.1012.36.7
Oct18° / 10°16911.3010.75.6
Nov12° / 17211.60.89.23.2
Dec / 1048.91.78.51.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16337
26337
36337
46337
56238
66238
76238
86139
96139
106139
116040
126040
135941
145941
155842
165743
175644
185545
195446
205446
215347
225347
235248
245149
255149
264951
274951
284753
294753
304555

Chance of precipitation in September

Any precipitation

Udine gets around 153 mm of rain over 11.1 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 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
236
336
436
536
637
737
837
937
1038
1138
1238
1338
1438
1538
1638
1738
1838
1938
2038
2138
2238
2338
2438
2538
2638
2739
2839
2940
3040

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 42% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
127283610
22828359
33028348
43129338
53229327
63330316
73430306
83531295
93631285
103632284
113732274
123832264
133933253
144033253
154133243
164233232
174333222
184433212
194633202
204732192
214832182
224932172
235032171
245132161
255231161
265331151
275331151
285331151
295430151
305430151

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

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
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 5:32 AM to 6:10 AM, and sunset from 6:41 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:326:41
213.15:346:39
313.05:356:37
413.05:366:35
512.95:386:33
612.95:396:31
712.85:406:29
812.85:416:27
912.75:436:25
1012.75:446:23
1112.65:456:21
1212.55:476:19
1312.55:486:17
1412.45:496:15
1512.45:506:13
1612.35:526:11
1712.35:536:09
1812.25:546:07
1912.25:566:05
2012.15:576:03
2112.05:586:01
2212.06:005:59
2311.96:015:57
2411.96:025:55
2511.86:045:53
2611.86:055:51
2711.76:065:49
2811.76:075:47
2911.66:095:45
3011.56:105:43

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.85 kWh/m².

For context, solar energy here swings from a low near 1.16 kWh/m² to a high of 6.19 kWh/m² in July across the year — September's 3.85 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
104.1Bright
114.1Bright
124.0Bright
134.0Moderate
143.9Moderate
153.9Moderate
163.8Moderate
173.7Moderate
183.7Moderate
193.6Moderate
203.6Moderate
213.5Moderate
223.5Moderate
233.4Moderate
243.4Moderate
253.3Moderate
263.2Moderate
273.2Moderate
283.1Moderate
293.1Moderate
303.0Moderate
Planning a trip in September

Is September a good time to visit Udine?

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

6.7
Sightseeing
1st-best month of the year
5.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Udine for sightseeing.

What to pack for Udine in September

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

In September, Udine sees daytime highs around 23°C and nights near 15°C. Worth packing: light clothes and rain gear. About 11 days see rain.

light clothesrain gear

Sea temperature near Udine 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 50 km away) is warmest in August at about 26°C and coldest in February near 10°C.

It's comfortable for a long swim from May 30 to Oct 9 — about 4.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar10Bracing
Apr13Bracing
May18Cool
Jun23Refreshing
Jul25Warm
Aug26Warm
Sep23Refreshing
Oct19Cool
Nov16Cool
Dec13Bracing

UV index in Udine 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 Udine 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
Feb2Moderate
Mar4Moderate
Apr7High
May7High
Jun8Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Udine 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 Udine is worst in January — around 19 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (September, 11 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Udine's WHO annual average of 14.5 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateJan 1819 µg/m³Sep 1411 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb17Moderate
Mar18Moderate
Apr16Moderate
May14Moderate
Jun14Moderate
Jul14Moderate
Aug11Good
Sep11Good
Oct12Moderate
Nov12Moderate
Dec16Moderate
Location & terrain

Where is Udine?

Udine sits at 46.1°N, 13.2°E, 113 m above sea level, in Italy. The nearest listed city is Gorizia, 33 km away.

Topography around Udine

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

Within 3 km, the terrain around Udine has only modest variations in elevation — a maximum elevation change of 49 m around an average of 112 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 817 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,763 m.

The land around Udine is covered by artificial surfaces (48%) and trees (20%) within 3 km, cropland (46%), trees (22%) and grassland (21%) within 16 km, and trees (51%) within 80 km.

3 km
49 m
16 km
817 m
80 km
2,763 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Gorizia 33 km · Nova Gorica 34 km · Monfalcone 37 km · Cordenons 43 km · Portogruaro 44 km · Pordenone 46 km · Sacile 58 km · Bohinj 60 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 Udine (46.0693°, 13.2371°, elevation 113 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).