Ústí nad Labem weather in September

In September, Ústí nad Labem sees average daytime highs of 17°C and overnight lows near 9°C, with 61 mm of rain across 10.9 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 19°C in the first days to 15°C by the end. The sky is clear or mostly clear about 22% 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 Ústí nad Labem's 4th-clearest and 9th-windiest month. For the whole year in context, see Ústí nad Labem's year-round climate.

Daytime high
17°
4th warmest
Overnight low
9th coldest
Rainfall
61 mm
10.9 wet days
Daylight
12 h 24 min
5:47 AM – 6:10 PM
Cloud cover
65%
4th clearest
Wind
10 km/h
9th windiest
Solar energy
3.1 kWh/m²
Travel score
5.3
out of 10

Ústí nad Labem is city in Ústí nad Labem Region, Czech Republic.

Air quality
Moderate
PM2.5 13.8 µg/m³ · 2019
Density
962/km²
people per km²
Founded
1056

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 19°C in the first days to 15°C by the end.

A typical September day in Ústí nad Labem reaches about 17°C in the afternoon and slips back to 9°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 12°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)
12011
22011
31910
41910
51910
61910
71910
81910
91810
10189
11189
12189
13189
14189
15189
16179
17178
18178
19178
20178
21178
22168
23168
24167
25167
26167
27167
28157
29157
30157

How September really feels in Ústí nad Labem

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.

Ústí nad Labem 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 / -4°5011.77.68.30.0
Feb / -4°399.66.19.70.0
Mar / -1°54124.611.50.8
Apr13° / 4610.91.313.53.3
May17° / 7113.60.115.25.0
Jun20° / 11°8313.4016.25.7
Jul22° / 13°9414.2015.86.1
Aug22° / 12°8512.6014.36.3
Sep17° / 6110.9012.45.3
Oct12° / 5110.60.310.42.9
Nov / 4810.438.70.5
Dec / -3°5010.96.27.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% 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 63%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23763
33763
43664
53763
63862
73862
83862
93862
103961
114060
124060
133961
144060
154060
164060
174060
183862
193862
203862
213763
223763
233763
243664
253565
263565
273367
283367
293367
303268

Chance of precipitation in September

Any precipitation

Ústí nad Labem gets around 61 mm of rain over 10.9 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 37% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
141
241
340
440
540
640
739
839
938
1038
1137
1237
1336
1436
1535
1635
1735
1835
1934
2034
2134
2234
2334
2434
2535
2635
2736
2836
2937
3037

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 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
174215
276204
377194
479183
580173
680173
782162
882162
983152
1085141
1186131
1286131
1387121
1488111
1589101
169091
179091
189181
199370
209370
219460
229550
239550
249640
259640
269730
279730
289820
299820
309820

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
2710calm
2810calm
2910calm
3010calm

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 5:23 AM to 6:09 AM, and sunset from 6:44 PM to 5:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:236:44
213.35:256:42
313.25:266:40
413.25:286:37
513.15:296:35
613.05:316:33
713.05:336:30
812.95:346:28
912.85:366:26
1012.85:376:23
1112.75:396:21
1212.65:416:19
1312.65:426:17
1412.55:446:14
1512.45:456:12
1612.45:476:10
1712.35:486:07
1812.25:506:05
1912.25:526:02
2012.15:536:00
2112.05:555:58
2212.05:565:55
2311.95:585:53
2411.96:005:51
2511.86:015:48
2611.76:035:46
2711.76:055:44
2811.66:065:42
2911.56:085:39
3011.56:095:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.1 kWh/m².

For context, solar energy here swings from a low near 0.69 kWh/m² to a high of 5.31 kWh/m² in June across the year — September's 3.1 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.6Moderate
43.6Moderate
53.5Moderate
63.5Moderate
73.5Moderate
83.4Moderate
93.4Moderate
103.4Moderate
113.3Moderate
123.3Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.1Moderate
183.0Moderate
193.0Moderate
202.9Moderate
212.9Moderate
222.9Moderate
232.8Moderate
242.8Moderate
252.7Moderate
262.7Moderate
272.6Moderate
282.6Moderate
292.5Moderate
302.5Moderate
Planning a trip in September

Is September a good time to visit Ústí nad Labem?

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

5.3
Sightseeing
4th-best month of the year
1.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Ústí nad Labem for sightseeing.

What to pack for Ústí nad Labem in September

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

In September, Ústí nad Labem sees daytime highs around 17°C and nights near 9°C. Worth packing: rain gear. About 11 days see rain.

rain gear

UV index in Ústí nad Labem 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 Ústí nad Labem peaks around June 20 at about 7 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighModerateLowJun 20UV 7Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr4Moderate
May6High
Jun7Very high
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Ústí nad Labem 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 Ústí nad Labem is worst in April — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Ústí nad Labem's WHO annual average of 13.8 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1216 µg/m³Dec 1211 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar16Moderate
Apr16Moderate
May15Moderate
Jun16Moderate
Jul14Moderate
Aug15Moderate
Sep14Moderate
Oct12Good
Nov11Good
Dec11Good
Location & terrain

Where is Ústí nad Labem?

Ústí nad Labem sits at 50.7°N, 14.0°E, 150 m above sea level, in Czechia. The nearest listed city is Teplice, 15 km away.

LitvínovMostPirnaČeská Lípa

Topography around Ústí nad Labem

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

Within 3 km, the terrain around Ústí nad Labem has significant variations in elevation — a maximum elevation change of 335 m around an average of 235 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 710 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,215 m.

The land around Ústí nad Labem is covered by trees (53%) and artificial surfaces (30%) within 3 km, trees (55%) and grassland (31%) within 16 km, and trees (42%) and cropland (35%) within 80 km.

3 km
335 m
16 km
710 m
80 km
1,215 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Teplice 15 km · Litoměřice 16 km · Terezín 19 km · Děčín 19 km · Litvínov 30 km · Most 33 km · Pirna 34 km · Česká Lípa 36 km

Czechia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 59% of US
price level, 2025
GDP per capita
$35,917
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
5.9
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 582
Religion
none 48%believers unaffiliated with a religious society 9%Roman Catholic 7%other believers belonging to a church or religious society 6%

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 Ústí nad Labem (50.6607°, 14.0323°, elevation 150 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).