Zadar weather in September

In September, Zadar sees average daytime highs of 25°C and overnight lows near 18°C, with 100 mm of rain across 7.8 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 23°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 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 Zadar's 4th-clearest and 8th-windiest month. For the whole year in context, see Zadar's year-round climate.

Daytime high
25°
4th warmest
Overnight low
18°
9th coldest
Rainfall
100 mm
7.8 wet days
Daylight
12 h 18 min
5:44 AM – 6:02 PM
Cloud cover
39%
4th clearest
Wind
12 km/h
8th windiest
Solar energy
4.48 kWh/m²
Travel score
7.4
out of 10

Zadar is city and settlement in Zadar County, Croatia.

Density
1,312/km²
people per km²
Founded
~383 BCE

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 23°C by the end.

A typical September day in Zadar reaches about 25°C in the afternoon and slips back to 18°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 28°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°35°151015202530
Avg high (°C)Avg low (°C)
12720
22720
32720
42720
52620
62619
72619
82619
92619
102619
112519
122519
132518
142518
152518
162518
172418
182418
192418
202417
212417
222417
232317
242317
252317
262317
272317
282316
292316
302216

Zadar 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
Jan10° / 84100.59.12.4
Feb11° / 819.10.710.22.7
Mar14° / 769.50.411.64.3
Apr17° / 11°769.9013.25.7
May22° / 16°718.8014.57.1
Jun26° / 20°476.5015.27.5
Jul29° / 22°304.30156.6
Aug29° / 22°514.7013.86.6
Sep25° / 18°1007.8012.37.4
Oct20° / 14°11210.4010.86.5
Nov15° / 10°13912.40.19.44.4
Dec11° / 109110.38.82.9

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 15% of September, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27822
37822
47723
57624
67624
77525
87426
97327
107327
117228
127129
137228
147129
157129
167030
177030
186931
196931
206931
216931
226832
236832
246832
256733
266634
276634
286535
296535
306436

Chance of precipitation in September

Any precipitation

Zadar gets around 100 mm of rain over 7.8 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 27% and peaks near 32% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
122
222
323
423
523
624
724
825
925
1026
1126
1227
1327
1428
1528
1628
1728
1828
1929
2029
2129
2229
2329
2429
2529
2630
2730
2831
2932
3032

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1182233251
2192233241
3202334221
4212334211
5212434201
6222435191
7222535180
8232535170
9232535160
10242536150
11252536150
12252536140
13262535140
14272535130
15282534120
16292534120
17302533110
18322632110
19332631100
20352530100
2136252990
2237252980
2339252880
2439252870
2540262870
2640262760
2740262760
2841272750
2941272750
3041272750

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

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 5:27 AM to 6:01 AM, and sunset from 6:31 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:276:31
213.05:286:29
313.05:296:27
412.95:306:25
512.95:316:23
612.85:336:22
712.85:346:20
812.75:356:18
912.75:366:16
1012.65:376:14
1112.65:396:12
1212.55:406:10
1312.55:416:08
1412.45:426:06
1512.45:436:04
1612.35:446:02
1712.25:466:00
1812.25:475:59
1912.15:485:57
2012.15:495:55
2112.05:505:53
2212.05:525:51
2311.95:535:49
2411.95:545:47
2511.85:555:45
2611.85:565:43
2711.75:585:41
2811.75:595:39
2911.66:005:37
3011.66:015:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.48 kWh/m².

For context, solar energy here swings from a low near 1.4 kWh/m² to a high of 6.95 kWh/m² in July across the year — September's 4.48 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.2Bright
45.1Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.1Bright
234.1Bright
244.0Bright
254.0Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Zadar?

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
6.5
Beach & pool
4th-best month of the year

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

What to pack for Zadar in September

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

In September, Zadar sees daytime highs around 25°C and nights near 18°C. Worth packing: light clothes. About 8 days see rain.

light clothes

Sea temperature near Zadar 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 28 km away) is warmest in August at about 25°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 3 to Oct 21 — about 4.6 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr14Bracing
May18Cool
Jun22Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct20Refreshing
Nov18Cool
Dec16Cool

UV index in Zadar 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 Zadar peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highModerateLowJul 16UV 9Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar5Moderate
Apr7High
May7High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Zadar?

Zadar sits at 44.1°N, 15.2°E, 2 m above sea level, in Croatia. The nearest listed city is Sibenik, 68 km away.

SibenikBihaćCazinBosanska KrupaCresSplitSolinVelika Kladuša

Topography around Zadar

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

Within 3 km, the terrain around Zadar has only modest variations in elevation — a maximum elevation change of 104 m around an average of 15 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 271 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,733 m.

The land around Zadar is covered by water (53%) and artificial surfaces (33%) within 3 km, water (45%) and trees (20%) within 16 km, and water (47%) and trees (28%) within 80 km.

3 km
104 m
16 km
271 m
80 km
1,733 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sibenik 68 km · Bihać 93 km · Cazin 110 km · Bosanska Krupa 113 km · Cres 114 km · Split 119 km · Solin 120 km · Velika Kladuša 127 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 Zadar (44.1158°, 15.2251°, elevation 2 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).