Korčula weather in September

In September, Korčula sees average daytime highs of 24°C and overnight lows near 18°C, with 131 mm of rain across 7.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 22°C by the end. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels humid.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Korčula's 4th-clearest and 10th-windiest month. For the whole year in context, see Korčula's year-round climate.

Daytime high
24°
4th warmest
Overnight low
18°
9th coldest
Rainfall
131 mm
7.9 wet days
Daylight
12 h 18 min
5:37 AM – 5:54 PM
Cloud cover
40%
4th clearest
Wind
11 km/h
10th windiest
Solar energy
4.62 kWh/m²
Travel score
7.4
out of 10

Korčula is town and settlement in Dubrovnik-Neretva County, Croatia.

Density
24/km²
people per km²

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 22°C by the end.

A typical September day in Korčula reaches about 24°C in the afternoon and slips back to 18°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 27°C. Set against its neighbours, September runs about 4°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12720
22620
32620
42620
52619
62619
72619
82519
92519
102519
112518
122518
132518
142418
152418
162418
172418
182417
192417
202317
212317
222317
232317
242317
252316
262316
272216
282216
292216
302216

Korčula weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 14311.80.79.22.4
Feb11° / 12210.9110.22.7
Mar14° / 11210.30.511.64.1
Apr17° / 11°10710.9013.15.4
May21° / 15°768.6014.46.9
Jun26° / 19°505.6015.17.9
Jul28° / 22°244.1014.87.3
Aug28° / 22°504.9013.87.2
Sep24° / 18°1317.9012.37.4
Oct20° / 14°15711.1010.86.4
Nov15° / 10°21513.80.19.54.4
Dec11° / 18312.80.38.92.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27822
37723
47624
57525
67426
77228
87228
97129
107129
116931
126931
136832
146832
156733
166832
176733
186733
196733
206733
216634
226634
236634
246634
256733
266733
276634
286634
296634
306634

Chance of precipitation in September

Any precipitation

Korčula gets around 131 mm of rain over 7.9 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 28% and peaks near 33% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
122
223
323
423
524
624
724
825
925
1026
1126
1227
1327
1428
1528
1628
1729
1829
1929
2030
2130
2230
2330
2430
2530
2631
2731
2832
2932
3033

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1141636331
2151736311
3161737291
4161837271
5171838261
6181939241
7181939221
8192040211
9192041190
10202041180
11212141170
12212141160
13222241150
14232241140
15242240130
16252339130
17262438120
18272437110
19292536110
20302535100
21312533100
22322632100
2333263190
2434273090
2535273080
2635282980
2735282970
2836292870
2936302860
3036312860

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 5:20 AM to 5:53 AM, and sunset from 6:22 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:206:22
213.05:216:20
312.95:236:18
412.95:246:17
512.85:256:15
612.85:266:13
712.75:276:11
812.75:286:09
912.65:296:07
1012.65:306:06
1112.55:326:04
1212.55:336:02
1312.45:346:00
1412.45:355:58
1512.35:365:56
1612.35:375:54
1712.25:385:53
1812.25:395:51
1912.15:415:49
2012.15:425:47
2112.05:435:45
2212.05:445:43
2311.95:455:41
2411.95:465:39
2511.85:475:38
2611.85:495:36
2711.75:505:34
2811.75:515:32
2911.65:525:30
3011.65:535:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.62 kWh/m².

For context, solar energy here swings from a low near 1.49 kWh/m² to a high of 7.1 kWh/m² in July across the year — September's 4.62 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.3Bright
35.3Bright
45.2Bright
55.2Bright
65.1Bright
75.0Bright
85.0Bright
94.9Bright
104.9Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.5Bright
184.5Bright
194.4Bright
204.4Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.0Bright
284.0Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Korčula

In seasonPeak

In September, Korčula sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Korčula's rainy season runs September–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Korčula?

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

7.4
Sightseeing
2nd-best month of the year
6.3
Beach & pool
4th-best month of the year

September is one of the better times to visit Korčula for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Korčula in September

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

In September, Korčula sees daytime highs around 24°C and nights near 18°C. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

Sea temperature near Korčula 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 offshore is warmest in August at about 25°C and coldest in February near 14°C.

It's comfortable for a long swim from May 31 to Oct 28 — about 5 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Korčula 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 Korčula peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 16UV 9Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar5Moderate
Apr7High
May7High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Korčula?

Korčula sits at 43.0°N, 17.1°E, 0 m above sea level, in Croatia. The nearest listed city is Neum, 39 km away.

NeumMeđugorjeHvarMostarSplitSolinDubrovnikKonjic

Topography around Korčula

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

Within 3 km, the terrain around Korčula has large variations in elevation — a maximum elevation change of 693 m around an average of 72 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 946 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,187 m.

The land around Korčula is covered by water (41%) and trees (39%) within 3 km, water (71%) and trees (20%) within 16 km, and water (55%) and trees (25%) within 80 km.

3 km
693 m
16 km
946 m
80 km
2,187 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Neum 39 km · Međugorje 51 km · Hvar 61 km · Mostar 69 km · Split 83 km · Solin 83 km · Dubrovnik 87 km · Konjic 102 km

Croatia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 53% of US
price level, 2025
GDP per capita
$27,104
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
87%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
7.9
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 617
Religion
Roman Catholic 79%other Christian 5%none or atheist 5%Orthodox 3%

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 Korčula (42.9604°, 17.1352°, elevation 0 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).