Žumberak weather in September

In September, Žumberak sees average daytime highs of 22°C and overnight lows near 12°C, with 110 mm of rain across 11.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 1st-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 34% 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 Žumberak's 4th-clearest and 10th-windiest month. For the whole year in context, see Žumberak's year-round climate.

Daytime high
22°
4th warmest
Overnight low
12°
9th coldest
Rainfall
110 mm
11.3 wet days
Daylight
12 h 18 min
5:43 AM – 6:02 PM
Cloud cover
57%
4th clearest
Wind
6 km/h
10th windiest
Solar energy
3.58 kWh/m²
Travel score
6.4
out of 10

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 Žumberak reaches about 22°C in the afternoon and slips back to 12°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 27°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)
12414
22414
32414
42414
52414
62313
72313
82313
92313
102313
112313
122212
132212
142212
152212
162212
172112
182111
192111
202111
212111
222111
232011
242011
252010
262010
272010
282010
292010
301910

How September really feels in Žumberak

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.

Žumberak weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°5695.28.90.0
Feb / -1°6794.610.10.9
Mar12° / 6410.22.611.63.3
Apr17° / 78110.513.35.2
May22° / 11°9913.4014.76.1
Jun25° / 15°9711.8015.46.5
Jul28° / 16°9111.3015.26.4
Aug27° / 16°9910.6013.96.5
Sep22° / 12°11011.3012.36.4
Oct17° / 879.30.110.75.3
Nov10° / 8910.11.89.32.4
Dec / -1°779.948.50.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 49%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25644
35644
45644
55644
65545
75545
85446
95347
105347
115248
125248
135149
145050
154951
164951
174852
184852
194852
204654
214654
224654
234753
244753
254753
264753
274753
284753
294852
304852

Chance of precipitation in September

Any precipitation

Žumberak gets around 110 mm of rain over 11.3 wet days in September, the wettest month. 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 (%)
139
239
339
439
540
640
740
840
940
1040
1140
1240
1340
1440
1539
1639
1739
1838
1938
2037
2137
2236
2335
2435
2534
2634
2734
2834
2934
3034

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 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13136293
23337283
33437262
43538252
53738242
63838231
73939221
84039211
94139201
104239190
114338180
124538170
134737160
144936150
155135140
165334130
175533120
185732110
195931100
20622990
21632890
22652780
23662770
24682660
25702550
26702550
27712540
28722530
29722530
30732520

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 5:24 AM to 6:01 AM, and sunset from 6:32 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:246:32
213.15:256:30
313.05:276:28
413.05:286:26
512.95:296:24
612.95:306:22
712.85:326:20
812.85:336:18
912.75:346:16
1012.65:356:14
1112.65:376:12
1212.55:386:10
1312.55:396:08
1412.45:416:06
1512.45:426:04
1612.35:436:02
1712.35:446:00
1812.25:465:58
1912.25:475:56
2012.15:485:54
2112.05:505:52
2212.05:515:50
2311.95:525:48
2411.95:535:46
2511.85:555:44
2611.85:565:42
2711.75:575:40
2811.75:595:38
2911.66:005:36
3011.56:015:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.58 kWh/m².

For context, solar energy here swings from a low near 1.06 kWh/m² to a high of 5.92 kWh/m² in July across the year — September's 3.58 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.2Bright
34.2Bright
44.1Bright
54.1Bright
64.0Bright
74.0Moderate
83.9Moderate
93.9Moderate
103.8Moderate
113.8Moderate
123.7Moderate
133.7Moderate
143.6Moderate
153.6Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.4Moderate
203.4Moderate
213.3Moderate
223.3Moderate
233.3Moderate
243.2Moderate
253.2Moderate
263.1Moderate
273.1Moderate
283.1Moderate
293.0Moderate
303.0Moderate
Planning a trip in September

Is September a good time to visit Žumberak?

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

6.4
Sightseeing
3rd-best month of the year
4.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Žumberak for sightseeing.

What to pack for Žumberak in September

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

In September, Žumberak sees daytime highs around 22°C and nights near 12°C. Worth packing: rain gear. About 11 days see rain.

rain gear

UV index in Žumberak 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 Žumberak peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr7High
May6High
Jun8Very high
Jul8Very high
Aug7Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Žumberak 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 Žumberak is worst in March — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2218 µg/m³Sep 1713 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb16Moderate
Mar19Moderate
Apr18Moderate
May16Moderate
Jun16Moderate
Jul14Moderate
Aug14Moderate
Sep13Moderate
Oct14Moderate
Nov14Moderate
Dec15Moderate
Location & terrain

Where is Žumberak?

Žumberak sits at 45.8°N, 15.4°E, 0 m above sea level, in Croatia. The nearest listed city is Novo Mesto, 20 km away.

ZaprešićKarlovacCentarZagrebTrbovljeVelika Gorica

Topography around Žumberak

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

Within 3 km, the terrain around Žumberak has large variations in elevation — a maximum elevation change of 718 m around an average of 703 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,061 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,649 m.

The land around Žumberak is covered by trees (97%) within 3 km, trees (76%) within 16 km, and trees (75%) within 80 km.

3 km
718 m
16 km
1,061 m
80 km
1,649 m
treesgrasslandcroplandartificial surfaces
September weather nearby: Novo Mesto 20 km · Samobor 24 km · Zaprešić 32 km · Karlovac 32 km · Centar 44 km · Zagreb 44 km · Trbovlje 51 km · Velika Gorica 52 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 Žumberak (45.7671°, 15.4148°, 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. 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).