Košice weather in September

In September, Košice sees average daytime highs of 19°C and overnight lows near 9°C, with 69 mm of rain across 10 wet days and about 12.4 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 17°C by the end. The sky is clear or mostly clear about 28% 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 Košice's 3rd-clearest and 6th-windiest month. For the whole year in context, see Košice's year-round climate.

Daytime high
19°
5th warmest
Overnight low
9th coldest
Rainfall
69 mm
10 wet days
Daylight
12 h 24 min
5:19 AM – 5:40 PM
Cloud cover
59%
3rd clearest
Wind
9 km/h
6th windiest
Solar energy
3.42 kWh/m²
Travel score
6.0
out of 10

Košice is city in Slovakia.

Air quality
Elevated
PM2.5 16.1 µg/m³ · 2019
Density
923/km²
people per km²
Founded
1230

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 17°C by the end.

A typical September day in Košice reaches about 19°C in the afternoon and slips back to 9°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 25°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)
12211
22211
32211
42111
52111
62111
72110
82110
92010
102010
112010
122010
132010
14199
15199
16199
17199
18199
19189
20188
21188
22188
23188
24178
25178
26178
27177
28177
29177
30167

How September really feels in Košice

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.

Košice weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°317.768.50.0
Feb / -4°378.46.49.80.0
Mar / -0°419.73.111.61.4
Apr15° / 6411.40.813.44.1
May19° / 10214.60155.5
Jun23° / 12°9914.3015.96.0
Jul24° / 14°12314.7015.56.2
Aug24° / 13°8911.7014.26.7
Sep19° / 6910012.46.0
Oct13° / 598.90.310.53.7
Nov / 469.32.790.8
Dec / -4°378.85.28.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35446
45446
55347
65248
75248
85149
95149
105050
114951
124852
134852
144753
154753
164654
174654
184654
194555
204555
214555
224555
234555
244555
254654
264654
274654
284555
294555
304654

Chance of precipitation in September

Any precipitation

Košice gets around 69 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
237
337
436
536
635
735
835
935
1034
1134
1234
1333
1433
1533
1632
1732
1832
1932
2032
2132
2232
2332
2432
2532
2632
2732
2832
2933
3033

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 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
161318
263307
365296
467285
569274
670273
771263
873252
974242
1075241
1176231
1277221
1378211
1479201
1580191
1681181
1782171
1883161
1984151
2085141
2187130
2288120
2389110
2490100
259190
269280
279280
289370
299370
309460

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
258calm
268calm
278calm
288calm
298calm
308calm

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 4:57 AM to 5:39 AM, and sunset from 6:12 PM to 5:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.34:576:12
213.24:586:10
313.15:006:08
413.15:016:06
513.05:036:04
613.05:046:02
712.95:066:00
812.85:075:57
912.85:095:55
1012.75:105:53
1112.75:115:51
1212.65:135:49
1312.55:145:46
1412.55:165:44
1512.45:175:42
1612.45:195:40
1712.35:205:38
1812.25:225:35
1912.25:235:33
2012.15:255:31
2112.05:265:29
2212.05:285:27
2311.95:295:24
2411.95:305:22
2511.85:325:20
2611.75:335:18
2711.75:355:16
2811.65:365:13
2911.65:385:11
3011.55:395:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.42 kWh/m².

For context, solar energy here swings from a low near 0.81 kWh/m² to a high of 5.6 kWh/m² in June across the year — September's 3.42 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.1Bright
34.0Bright
44.0Moderate
53.9Moderate
63.9Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.6Moderate
123.6Moderate
133.5Moderate
143.5Moderate
153.4Moderate
163.4Moderate
173.3Moderate
183.3Moderate
193.2Moderate
203.2Moderate
213.1Moderate
223.1Moderate
233.0Moderate
243.0Moderate
252.9Moderate
262.9Moderate
272.9Moderate
282.8Moderate
292.8Moderate
302.7Moderate
Planning a trip in September

Hazard calendar for Košice

In seasonPeak

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

Košice's rainy season runs April–October, 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 Košice?

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

6.0
Sightseeing
3rd-best month of the year
2.7
Beach & pool
4th-best month of the year

September is a reasonable time to visit Košice for sightseeing.

What to pack for Košice in September

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

In September, Košice sees daytime highs around 19°C and nights near 9°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Košice 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 Košice peaks around July 12 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 12UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul7Very high
Aug7High
Sep5Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Košice 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 Košice is worst in June — around 20 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 12 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Košice's WHO annual average of 16.1 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2019 µg/m³Dec 1812 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb15Moderate
Mar18Moderate
Apr18Moderate
May17Moderate
Jun20Moderate
Jul19Moderate
Aug18Moderate
Sep15Moderate
Oct14Moderate
Nov15Moderate
Dec12Moderate
Location & terrain

Where is Košice?

Košice sits at 48.7°N, 21.3°E, 205 m above sea level, in Slovakia. The nearest listed city is Prešov, 32 km away.

PrešovTrebišovVranov nad TopľouSátoraljaújhelyMichalovceRožňavaHumennéSpišská Nová Ves

Topography around Košice

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

Within 3 km, the terrain around Košice has only modest variations in elevation — a maximum elevation change of 145 m around an average of 238 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 857 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,434 m.

The land around Košice is covered by artificial surfaces (53%) and trees (33%) within 3 km, trees (47%) and cropland (32%) within 16 km, and trees (52%) and cropland (30%) within 80 km.

3 km
145 m
16 km
857 m
80 km
1,434 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Prešov 32 km · Trebišov 35 km · Vranov nad Topľou 37 km · Sátoraljaújhely 46 km · Michalovce 49 km · Rožňava 53 km · Humenné 54 km · Spišská Nová Ves 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 Košice (48.7144°, 21.258°, elevation 205 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).