Petržalka weather in September

In September, Petržalka sees average daytime highs of 21°C and overnight lows near 12°C, with 68 mm of rain across 9 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 24°C in the first days to 19°C by the end. The sky is clear or mostly clear about 35% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Petržalka's 3rd-clearest and 8th-windiest month. For the whole year in context, see Petržalka's year-round climate.

Daytime high
21°
4th warmest
Overnight low
12°
9th coldest
Rainfall
68 mm
9 wet days
Daylight
12 h 18 min
5:35 AM – 5:56 PM
Cloud cover
56%
3rd clearest
Wind
12 km/h
8th windiest
Solar energy
3.56 kWh/m²
Travel score
6.7
out of 10

Petržalka is borough of Bratislava (Slovakia).

Density
3,918/km²
people per km²
Founded
1225

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 19°C by the end.

A typical September day in Petržalka reaches about 21°C in the afternoon and slips back to 12°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 27°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12414
22414
32414
42314
52314
62313
72313
82313
92313
102213
112213
122213
132212
142212
152112
162112
172112
182112
192112
202111
212011
222011
232011
242011
252011
261911
271910
281910
291910
301910

How September really feels in Petržalka

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.

Petržalka 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 / -2°367.83.58.60.0
Feb / -1°337.83.39.90.3
Mar11° / 418.51.511.62.6
Apr16° / 448.30.313.45.3
May21° / 11°7010.5014.96.4
Jun25° / 15°7411.1015.86.7
Jul27° / 16°7611.3015.46.4
Aug27° / 16°689.7014.16.8
Sep21° / 12°689012.46.7
Oct15° / 488.80.110.64.7
Nov / 488.51.791.7
Dec / -1°408.32.68.20.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25644
35644
45545
55545
65446
75446
85347
95248
105248
115149
125050
135050
145050
155050
165050
174951
184951
194951
205050
215050
224951
235050
244951
255050
265050
274951
284951
294852
304852

Chance of precipitation in September

Any precipitation

Petržalka gets around 68 mm of rain over 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 30% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
134
233
333
433
533
633
733
832
932
1032
1132
1231
1331
1431
1530
1630
1730
1830
1929
2029
2129
2228
2328
2428
2527
2627
2728
2828
2928
3029

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 70% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15331151
25431141
35730130
45830120
55831110
65931100
7603190
8593290
9603280
10613270
11623170
12643060
13652960
14672850
15682750
16692650
17722440
18742240
19752140
20781930
21791830
22811630
23831520
24841420
25841420
26851320
27861310
28861310
29861310
30851410

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 12 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 102 minutes over September. Sunrise moves from 5:14 AM to 5:56 AM, and sunset from 6:28 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:146:28
213.25:166:26
313.15:176:24
413.15:186:22
513.05:206:20
612.95:216:18
712.95:236:16
812.85:246:13
912.85:266:11
1012.75:276:09
1112.65:286:07
1212.65:306:05
1312.55:316:03
1412.55:336:00
1512.45:345:58
1612.35:355:56
1712.35:375:54
1812.25:385:52
1912.25:405:50
2012.15:415:47
2112.05:435:45
2212.05:445:43
2311.95:455:41
2411.95:475:39
2511.85:485:37
2611.75:505:35
2711.75:515:32
2811.65:535:30
2911.65:545:28
3011.55:565:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.56 kWh/m².

For context, solar energy here swings from a low near 0.9 kWh/m² to a high of 5.87 kWh/m² in June across the year — September's 3.56 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.1Bright
44.1Bright
54.0Bright
64.0Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.8Moderate
113.8Moderate
123.7Moderate
133.7Moderate
143.6Moderate
153.6Moderate
163.5Moderate
173.5Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.3Moderate
223.3Moderate
233.2Moderate
243.2Moderate
253.1Moderate
263.1Moderate
273.0Moderate
283.0Moderate
293.0Moderate
302.9Moderate
Planning a trip in September

Is September a good time to visit Petržalka?

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

6.7
Sightseeing
2nd-best month of the year
4.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Petržalka for sightseeing.

What to pack for Petržalka in September

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

In September, Petržalka sees daytime highs around 21°C and nights near 12°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Petržalka in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Petržalka peaks around July 11 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 11UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul8Very high
Aug7High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Petržalka 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 Petržalka is worst in June — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJun 1516 µg/m³Dec 1411 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar16Moderate
Apr16Moderate
May16Moderate
Jun17Moderate
Jul15Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Petržalka?

Petržalka sits at 48.1°N, 17.1°E, 141 m above sea level, in Slovakia. The nearest listed city is Bratislava, 3.0 km away.

Topography around Petržalka

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

Within 3 km, the terrain around Petržalka has only modest variations in elevation — a maximum elevation change of 77 m around an average of 139 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 480 m; within 80 km, large variations in elevation — a maximum elevation change of 734 m.

The land around Petržalka is covered by artificial surfaces (39%) and trees (38%) within 3 km, cropland (42%) and trees (31%) within 16 km, and cropland (55%) and trees (27%) within 80 km.

3 km
77 m
16 km
480 m
80 km
734 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Bratislava 3.0 km · Staré Mesto 4.0 km · Podunajské Biskupice 6.0 km · Vrakuňa 6.0 km · Karlova Ves 6.0 km · Dlhé diely 7.0 km · Dúbravka 10 km · Devínska Nová Ves 15 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 Petržalka (48.1233°, 17.1287°, elevation 141 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).