Starý Bohumín weather in September

In September, Starý Bohumín sees average daytime highs of 19°C and overnight lows near 10°C, with 70 mm of rain across 10.5 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 17°C by the end. The sky is clear or mostly clear about 25% 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 Starý Bohumín's 3rd-clearest and 8th-windiest month. For the whole year in context, see Starý Bohumín's year-round climate.

Daytime high
19°
4th warmest
Overnight low
10°
9th coldest
Rainfall
70 mm
10.5 wet days
Daylight
12 h 24 min
5:30 AM – 5:52 PM
Cloud cover
61%
3rd clearest
Wind
11 km/h
8th windiest
Solar energy
3.15 kWh/m²
Travel score
6.0
out of 10

Starý Bohumín is neighborhood of Bohumín.

Density
4,689/km²
people per km²
Founded
1262

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 17°C by the end.

A typical September day in Starý Bohumín reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°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)
12212
22212
32212
42112
52112
62111
72111
82111
92111
102011
112011
122011
132010
142010
152010
161910
171910
181910
191910
20199
21189
22189
23189
24189
25189
26189
27179
28179
29178
30178

How September really feels in Starý Bohumín

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.

Starý Bohumín weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°4010.16.18.40.0
Feb / -2°369.55.69.70.0
Mar / 4711.23.211.51.4
Apr14° / 479.70.813.54.2
May19° / 7612.8015.15.7
Jun22° / 12°8312.40166.2
Jul25° / 14°9713.3015.76.5
Aug25° / 14°6910.8014.36.7
Sep19° / 10°7010.5012.46.0
Oct14° / 529.70.310.53.9
Nov / 469.92.48.81.2
Dec / -2°419.84.780.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% 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 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34852
44753
54654
64654
74654
84654
94654
104456
114456
124456
134357
144258
154357
164357
174258
184258
194258
204159
214159
224159
234159
244258
254258
264159
274159
284060
294060
304060

Chance of precipitation in September

Any precipitation

Starý Bohumín gets around 70 mm of rain over 10.5 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 35% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
236
337
437
537
637
737
837
937
1037
1136
1236
1335
1435
1535
1634
1734
1834
1933
2033
2133
2233
2332
2432
2532
2632
2733
2833
2933
3034

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 (%)
165287
267276
368275
468275
570264
670264
771263
872253
973252
1074242
1175232
1276222
1377212
1479201
1580191
1681181
1782171
1883161
1985141
2086131
2187121
2288111
2390100
249190
259280
269280
279280
289370
299370
309370

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 12 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
2712calm
2812calm
2912calm
3012calm

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 5:07 AM to 5:52 AM, and sunset from 6:26 PM to 5:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:076:26
213.35:086:24
313.25:106:21
413.15:126:19
513.15:136:17
613.05:156:15
712.95:166:12
812.95:186:10
912.85:196:08
1012.75:216:06
1112.75:226:03
1212.65:246:01
1312.65:255:59
1412.55:275:57
1512.45:285:54
1612.45:305:52
1712.35:315:50
1812.25:335:47
1912.25:355:45
2012.15:365:43
2112.05:385:41
2212.05:395:38
2311.95:415:36
2411.95:425:34
2511.85:445:31
2611.75:455:29
2711.75:475:27
2811.65:495:25
2911.55:505:22
3011.55:525:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.15 kWh/m².

For context, solar energy here swings from a low near 0.74 kWh/m² to a high of 5.33 kWh/m² in June across the year — September's 3.15 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.7Moderate
43.6Moderate
53.6Moderate
63.6Moderate
73.5Moderate
83.5Moderate
93.5Moderate
103.4Moderate
113.4Moderate
123.3Moderate
133.3Moderate
143.3Moderate
153.2Moderate
163.2Moderate
173.1Moderate
183.1Moderate
193.0Moderate
203.0Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.8Moderate
252.8Moderate
262.7Moderate
272.7Moderate
282.6Moderate
292.6Moderate
302.5Moderate
Planning a trip in September

Is September a good time to visit Starý Bohumín?

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

6.0
Sightseeing
4th-best month of the year
2.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Starý Bohumín for sightseeing.

What to pack for Starý Bohumín in September

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

In September, Starý Bohumín sees daytime highs around 19°C and nights near 10°C. Worth packing: rain gear. About 11 days see rain.

rain gear

UV index in Starý Bohumín 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 Starý Bohumín 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 19 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 19UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May6High
Jun7Very high
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Starý Bohumín 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 Starý Bohumín is worst in June — around 18 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJun 1518 µg/m³Dec 1411 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar17Moderate
Apr17Moderate
May17Moderate
Jun18Moderate
Jul17Moderate
Aug17Moderate
Sep15Moderate
Oct13Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Starý Bohumín?

Starý Bohumín sits at 49.9°N, 18.3°E, 200 m above sea level, in Czechia. The nearest listed city is Bohumín, 2.0 km away.

Topography around Starý Bohumín

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

Within 3 km, the terrain around Starý Bohumín has only modest variations in elevation — a maximum elevation change of 43 m around an average of 201 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 174 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,310 m.

The land around Starý Bohumín is covered by cropland (41%) and trees (28%) within 3 km, trees (43%) and cropland (28%) within 16 km, and trees (51%) and cropland (29%) within 80 km.

3 km
43 m
16 km
174 m
80 km
1,310 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Bohumín 2.0 km · Ostrava 10 km · Orlová 10 km · Wodzisław Śląski 14 km · Karviná 16 km · Rydułtowy 17 km · Havířov 17 km · Jastrzębie Zdrój 18 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 Starý Bohumín (49.9169°, 18.3362°, elevation 200 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).