Gorizia weather in September

In September, Gorizia sees average daytime highs of 22°C and overnight lows near 14°C, with 163 mm of rain across 11.5 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 24°C in the first days to 20°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 Gorizia's 3rd-clearest and 8th-windiest month. For the whole year in context, see Gorizia's year-round climate.

Daytime high
22°
4th warmest
Overnight low
14°
9th coldest
Rainfall
163 mm
11.5 wet days
Daylight
12 h 18 min
5:50 AM – 6:09 PM
Cloud cover
51%
3rd clearest
Wind
7 km/h
8th windiest
Solar energy
3.85 kWh/m²
Travel score
6.5
out of 10
Air quality
Moderate
PM2.5 12.4 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 24°C in the first days to 20°C by the end.

A typical September day in Gorizia reaches about 22°C in the afternoon and slips back to 14°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 26°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)
12516
22516
32415
42415
52415
62415
72415
82315
92315
102314
112314
122314
132314
142214
152214
162214
172214
182213
192213
202113
212113
222113
232113
242113
252013
262012
272012
282012
292012
302012

How September really feels in Gorizia

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.

Gorizia 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 / 918.628.90.7
Feb / 978.22.2101.5
Mar12° / 11010.11.211.63.3
Apr16° / 12612.60.413.34.8
May21° / 12°13513.3014.76.0
Jun25° / 16°11412.8015.56.5
Jul27° / 18°8510.7015.26.6
Aug27° / 18°999.80146.7
Sep22° / 14°16311.5012.36.5
Oct17° / 10°20111.90.110.75.1
Nov11° / 20212.30.89.32.7
Dec / 1299.51.88.51.0

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 18% of September, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16337
26436
36436
46337
56337
66238
76238
86238
96139
106139
116040
126139
136040
145941
155842
165842
175644
185644
195545
205545
215446
225446
235347
245248
255149
265050
275050
284852
294852
304654

Chance of precipitation in September

Any precipitation

Gorizia gets around 163 mm of rain over 11.5 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 39% and peaks near 43% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
236
336
436
536
637
737
837
937
1038
1138
1238
1339
1439
1539
1639
1740
1840
1940
2040
2140
2240
2340
2440
2541
2641
2741
2842
2943
3043

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 45% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12930356
23131335
33231325
43332314
53432304
63533294
73634283
83634273
93735263
103835252
113835242
123935232
134035232
144235221
154335211
164435201
174634191
184834181
194933171
205132161
215232151
225531140
235630140
245730130
255830120
265929120
276029110
286029110
296129100
306228100

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 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
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:31 AM to 6:09 AM, and sunset from 6:39 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:316:39
213.15:326:38
313.05:346:36
413.05:356:34
512.95:366:32
612.95:376:30
712.85:396:28
812.85:406:26
912.75:416:24
1012.75:436:22
1112.65:446:20
1212.55:456:18
1312.55:466:16
1412.45:486:13
1512.45:496:11
1612.35:506:09
1712.35:526:07
1812.25:536:05
1912.25:546:03
2012.15:556:01
2112.05:575:59
2212.05:585:57
2311.95:595:55
2411.96:015:53
2511.86:025:51
2611.86:035:49
2711.76:055:47
2811.76:065:45
2911.66:075:43
3011.56:095:41

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 1.14 kWh/m² to a high of 6.2 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
263.3Moderate
273.2Moderate
283.1Moderate
293.1Moderate
303.0Moderate
Planning a trip in September

Is September a good time to visit Gorizia?

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

6.5
Sightseeing
3rd-best month of the year
4.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Gorizia for sightseeing.

What to pack for Gorizia in September

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

In September, Gorizia sees daytime highs around 22°C and nights near 14°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Gorizia 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 35 km away) is warmest in August at about 25°C and coldest in February near 10°C.

It's comfortable for a long swim from May 31 to Oct 9 — about 4.3 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
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov16Cool
Dec13Bracing

UV index in Gorizia 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 Gorizia 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
May6High
Jun8Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Gorizia 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 Gorizia is worst in January — around 16 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (September, 9 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Gorizia's WHO annual average of 12.4 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodModerateJan 1816 µg/m³Sep 149 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb14Moderate
Mar15Moderate
Apr14Moderate
May12Good
Jun12Moderate
Jul12Moderate
Aug10Good
Sep9Good
Oct11Good
Nov11Good
Dec13Moderate
Location & terrain

Where is Gorizia?

Gorizia sits at 45.9°N, 13.6°E, 84 m above sea level, in Italy. The nearest listed city is Nova Gorica, 3.0 km away.

Topography around Gorizia

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

Within 3 km, the terrain around Gorizia has only modest variations in elevation — a maximum elevation change of 201 m around an average of 92 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,405 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,763 m.

The land around Gorizia is covered by trees (52%) and artificial surfaces (29%) within 3 km, trees (68%) and grassland (20%) within 16 km, and trees (55%) within 80 km.

3 km
201 m
16 km
1,405 m
80 km
2,763 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Nova Gorica 3.0 km · Monfalcone 17 km · Udine 33 km · Trieste 35 km · Divača 39 km · Koper 44 km · Bohinj 45 km · Piran 46 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 Gorizia (45.9409°, 13.6217°, elevation 84 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).