Zvolen weather in September

In September, Zvolen sees average daytime highs of 18°C and overnight lows near 8°C, with 72 mm of rain across 10 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 16°C by the end. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 18 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Zvolen's 3rd-clearest and 5th-windiest month. For the whole year in context, see Zvolen's year-round climate.

Daytime high
18°
4th warmest
Overnight low
9th coldest
Rainfall
72 mm
10 wet days
Daylight
12 h 24 min
5:27 AM – 5:48 PM
Cloud cover
59%
3rd clearest
Wind
7 km/h
5th windiest
Solar energy
3.44 kWh/m²
Travel score
5.8
out of 10

Zvolen is town in Slovakia.

Air quality
Moderate
PM2.5 14.4 µg/m³ · 2019
Density
404/km²
people per km²
Founded
1135

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 21°C in the first days to 16°C by the end.

A typical September day in Zvolen reaches about 18°C in the afternoon and slips back to 8°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 23°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12110
22110
32110
42010
52010
62010
7209
8209
9199
10199
11199
12199
13199
14199
15188
16188
17188
18188
19188
20188
21178
22177
23177
24177
25177
26177
27167
28167
29167
30166

How September really feels in Zvolen

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.

Zvolen 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
Jan / -6°469.27.18.50.0
Feb / -5°469.26.59.80.0
Mar / -1°539.83.411.61.2
Apr14° / 6210.70.613.43.9
May18° / 99140155.4
Jun22° / 11°10614.2015.85.9
Jul24° / 12°10313.6015.56.4
Aug23° / 12°8811.3014.16.8
Sep18° / 7210012.45.8
Oct12° / 6510.40.410.63.4
Nov / 6210.52.790.7
Dec / -4°519.66.18.20.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% 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 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25446
35347
45347
55248
65149
75050
85050
94951
104753
114753
124753
134654
144654
154852
164753
174753
184654
194654
204654
214555
224555
234555
244555
254654
264654
274555
284555
294555
304456

Chance of precipitation in September

Any precipitation

Zvolen gets around 72 mm of rain over 10 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 34% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
236
336
436
536
636
736
836
936
1035
1135
1235
1335
1435
1535
1634
1734
1834
1934
2034
2133
2233
2332
2432
2532
2632
2732
2832
2932
3032

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 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
163307
265296
367285
467285
569274
671263
771263
873252
974242
1075232
1176222
1278211
1379201
1480191
1581181
1683161
1784151
1885141
1986131
2087121
2188111
2289101
239091
249280
259370
269370
279460
289460
299460
309550

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

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
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 18 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 108 minutes over September. Sunrise moves from 5:06 AM to 5:48 AM, and sunset from 6:21 PM to 5:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:066:21
213.25:076:19
313.15:086:16
413.15:106:14
513.05:116:12
613.05:136:10
712.95:146:08
812.85:166:06
912.85:176:04
1012.75:196:01
1112.75:205:59
1212.65:215:57
1312.55:235:55
1412.55:245:53
1512.45:265:50
1612.45:275:48
1712.35:295:46
1812.25:305:44
1912.25:325:42
2012.15:335:39
2112.05:345:37
2212.05:365:35
2311.95:375:33
2411.95:395:31
2511.85:405:28
2611.75:425:26
2711.75:435:24
2811.65:455:22
2911.65:465:20
3011.55:485:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.44 kWh/m².

For context, solar energy here swings from a low near 0.87 kWh/m² to a high of 5.71 kWh/m² in June across the year — September's 3.44 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.1Bright
34.1Bright
44.0Bright
54.0Moderate
63.9Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.6Moderate
123.6Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.4Moderate
173.4Moderate
183.3Moderate
193.3Moderate
203.2Moderate
213.2Moderate
223.1Moderate
233.1Moderate
243.0Moderate
253.0Moderate
263.0Moderate
272.9Moderate
282.9Moderate
292.8Moderate
302.8Moderate
Planning a trip in September

Is September a good time to visit Zvolen?

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

5.8
Sightseeing
4th-best month of the year
2.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Zvolen for sightseeing.

What to pack for Zvolen in September

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

In September, Zvolen sees daytime highs around 18°C and nights near 8°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Zvolen 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 Zvolen peaks around July 13 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 13UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul8Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Zvolen 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 Zvolen is worst in June — around 18 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 10 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Zvolen's WHO annual average of 14.4 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJun 1918 µg/m³Dec 1410 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar16Moderate
Apr17Moderate
May16Moderate
Jun18Moderate
Jul18Moderate
Aug17Moderate
Sep13Moderate
Oct11Good
Nov11Good
Dec10Good
Location & terrain

Where is Zvolen?

Zvolen sits at 48.6°N, 19.2°E, 297 m above sea level, in Slovakia. The nearest listed city is Banská Bystrica, 18 km away.

HandlováBreznoPrievidzaLučenecBojniceLevice

Topography around Zvolen

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

Within 3 km, the terrain around Zvolen has significant variations in elevation — a maximum elevation change of 302 m around an average of 341 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 816 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,041 m.

The land around Zvolen is covered by trees (49%) and artificial surfaces (22%) within 3 km, trees (60%) and grassland (20%) within 16 km, and trees (62%) and cropland (22%) within 80 km.

3 km
302 m
16 km
816 m
80 km
2,041 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Banská Bystrica 18 km · Žiar nad Hronom 22 km · Handlová 34 km · Brezno 44 km · Prievidza 45 km · Lučenec 46 km · Bojnice 48 km · Levice 57 km

Slovakia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E / F
230 V · 50 Hz
Prices
≈ 58% of US
price level, 2025
GDP per capita
$28,544
2025
Happiness
6.3 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
6.1
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 606
Religion
Roman Catholic 56%none 24%Evangelical Church of the Augsburg Confession 5%Greek Catholic 4%

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 Zvolen (48.5744°, 19.1532°, elevation 297 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).