Znojmo weather in September

In September, Znojmo sees average daytime highs of 20°C and overnight lows near 11°C, with 63 mm of rain across 8.6 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 22°C in the first days to 18°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 Znojmo's 3rd-clearest and 8th-windiest month. For the whole year in context, see Znojmo's year-round climate.

Daytime high
20°
4th warmest
Overnight low
11°
9th coldest
Rainfall
63 mm
8.6 wet days
Daylight
12 h 24 min
5:40 AM – 6:01 PM
Cloud cover
60%
3rd clearest
Wind
11 km/h
8th windiest
Solar energy
3.4 kWh/m²
Travel score
6.4
out of 10

Znojmo is town in the Czech Republic.

Air quality
Moderate
PM2.5 14.2 µg/m³ · 2019
Density
535/km²
people per km²
Founded
1226

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 22°C in the first days to 18°C by the end.

A typical September day in Znojmo reaches about 20°C in the afternoon and slips back to 11°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 14°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)
12313
22213
32213
42213
52212
62212
72112
82112
92112
102112
112112
122011
132011
142011
152011
162011
172011
181910
191910
201910
211910
221910
231810
241810
25189
26189
27189
28189
29179
30179

How September really feels in Znojmo

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.

Znojmo 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 / -3°297.44.28.50.0
Feb / -2°236.439.80.1
Mar / 378.31.911.62.0
Apr15° / 408.40.513.44.6
May20° / 10°6511.50156.0
Jun23° / 13°7411.2015.96.6
Jul26° / 15°8212.1015.56.5
Aug25° / 15°7210.2014.26.8
Sep20° / 11°638.6012.46.4
Oct14° / 417.70.210.54.0
Nov / 357.91.48.91.1
Dec / -2°327.62.98.10.0

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 18% of September, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25149
35050
45149
54951
65050
75050
84852
94852
104852
114852
124852
134753
144654
154654
164654
174555
184555
194555
204456
214456
224456
234456
244357
254357
264357
274258
284258
294060
304060

Chance of precipitation in September

Any precipitation

Znojmo gets around 63 mm of rain over 8.6 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 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
131
231
330
430
530
630
730
830
929
1029
1129
1229
1329
1429
1529
1629
1729
1829
1929
2028
2128
2228
2327
2427
2526
2626
2726
2826
2926
3026

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 (%)
168248
269247
371236
472235
572235
673234
774233
875223
976222
1076222
1177212
1278211
1379201
1479201
1580191
1681181
1782171
1883161
1984151
2086140
2187130
2288120
2390100
249190
259190
269280
279370
289370
299370
309460

Wind in September

Winds average 11 km/h in September.

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

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 5:18 AM to 6:00 AM, and sunset from 6:33 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:186:33
213.25:196:31
313.15:206:29
413.15:226:27
513.05:236:25
613.05:256:23
712.95:266:21
812.85:286:18
912.85:296:16
1012.75:316:14
1112.75:326:12
1212.65:346:10
1312.55:356:07
1412.55:376:05
1512.45:386:03
1612.45:406:01
1712.35:415:59
1812.25:425:56
1912.25:445:54
2012.15:455:52
2112.05:475:50
2212.05:485:47
2311.95:505:45
2411.95:515:43
2511.85:535:41
2611.75:545:39
2711.75:565:36
2811.65:575:34
2911.65:595:32
3011.56:005:30

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.4 kWh/m².

For context, solar energy here swings from a low near 0.84 kWh/m² to a high of 5.65 kWh/m² in June across the year — September's 3.4 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.0Bright
34.0Moderate
43.9Moderate
53.9Moderate
63.8Moderate
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
262.9Moderate
272.9Moderate
282.8Moderate
292.8Moderate
302.7Moderate
Planning a trip in September

Is September a good time to visit Znojmo?

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

6.4
Sightseeing
4th-best month of the year
3.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Znojmo for sightseeing.

What to pack for Znojmo in September

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

In September, Znojmo sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Znojmo 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 Znojmo 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 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 12UV 7Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun7Very high
Jul8Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Znojmo 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 Znojmo is worst in June — around 18 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (November, 10 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Znojmo's WHO annual average of 14.2 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJun 1418 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar17Moderate
Apr17Moderate
May17Moderate
Jun18Moderate
Jul16Moderate
Aug15Moderate
Sep13Moderate
Oct12Good
Nov10Good
Dec10Good
Location & terrain

Where is Znojmo?

Znojmo sits at 48.9°N, 16.0°E, 294 m above sea level, in Czechia. The nearest listed city is Třebíč, 42 km away.

TřebíčStockerauBystrcŽabovřeskyBrno středBrnoKrálovo PoleŽidenice

Topography around Znojmo

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

Within 3 km, the terrain around Znojmo has only modest variations in elevation — a maximum elevation change of 183 m around an average of 282 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 359 m; within 80 km, large variations in elevation — a maximum elevation change of 823 m.

The land around Znojmo is covered by trees (36%), cropland (26%) and artificial surfaces (21%) within 3 km, cropland (58%) and trees (28%) within 16 km, and cropland (49%) and trees (35%) within 80 km.

3 km
183 m
16 km
359 m
80 km
823 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Třebíč 42 km · Stockerau 54 km · Bystrc 54 km · Žabovřesky 55 km · Brno střed 55 km · Brno 56 km · Královo Pole 57 km · Židenice 58 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 Znojmo (48.8555°, 16.0488°, elevation 294 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).