Ostrava weather in August

In August, Ostrava sees average daytime highs of 24°C and overnight lows near 13°C, with 85 mm of rain across 11.7 wet days and about 14.2 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 22°C by the end. The sky is clear or mostly clear about 32% of the time in August, and the air most often feels dry.

Daylight stretches from about 15 h 06 min at the start of August to 13 h 24 min by month's end. Set against the rest of the year, August is Ostrava's 1st-clearest and 12th-windiest month. For the whole year in context, see Ostrava's year-round climate.

Daytime high
24°
1st warmest
Overnight low
13°
11th coldest
Rainfall
85 mm
11.7 wet days
Daylight
14 h 18 min
4:43 AM – 6:59 PM
Cloud cover
55%
1st clearest
Wind
9 km/h
12th windiest
Solar energy
4.61 kWh/m²
Travel score
6.7
out of 10

Ostrava is city in Czechia.

Air quality
Elevated
PM2.5 20.3 µg/m³ · 2019
Density
1,306/km²
people per km²
Founded
1267

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 25°C in the first days to 22°C by the end.

A typical August day in Ostrava reaches about 24°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 29°C. Set against its neighbours, August runs on par with July and about 5°C warmer than September.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12514
22514
32514
42514
52514
62514
72514
82414
92414
102414
112414
122414
132414
142414
152414
162413
172413
182413
192413
202313
212313
222313
232313
242313
252313
262212
272212
282212
292212
302112
312112

How August really feels in Ostrava

Once humidity and wind are folded in, August 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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ostrava weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°4711.18.48.40.0
Feb / -3°4510.87.89.70.0
Mar / -0°5512.14.711.51.1
Apr14° / 5710.81.713.53.8
May18° / 90140.115.15.4
Jun21° / 12°10013.60165.9
Jul24° / 14°11514.3015.76.3
Aug24° / 13°8511.7014.26.7
Sep19° / 10°8211012.45.7
Oct13° / 5910.30.410.53.5
Nov / 5310.53.58.81.0
Dec / -2°4911.1780.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 45%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25644
35545
45644
55644
65545
75545
85446
95545
105545
115545
125545
135644
145644
155644
165644
175644
185743
195743
205644
215644
225644
235644
245545
255545
265446
275347
285248
295149
305149
315050

Chance of precipitation in August

Any precipitation

Ostrava gets around 85 mm of rain over 11.7 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
241
340
440
540
639
739
839
939
1039
1138
1238
1338
1437
1537
1637
1737
1836
1936
2036
2136
2237
2337
2437
2538
2638
2739
2839
2940
3040
3140

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 43% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12942272
23042262
33042262
43142262
53142252
63242241
73342231
83442221
93542211
103642201
113742191
123842191
133942181
144042171
154141171
164241161
174340161
184440161
194539151
204639151
214738141
224837141
234936141
245135131
255334121
265533111
275632111
285831101
29603091
30622981
31642871

Wind in August

Winds average 9 km/h in August, the calmest month.

Across August, 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.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 06 min at the start of August to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over August. Sunrise moves from 4:21 AM to 5:06 AM, and sunset from 7:25 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.14:217:25
215.04:227:23
315.04:247:22
414.94:257:20
514.94:277:19
614.84:287:17
714.84:307:15
814.74:317:14
914.74:337:12
1014.64:347:10
1114.54:367:08
1214.54:377:06
1314.44:387:05
1414.44:407:03
1514.34:417:01
1614.34:436:59
1714.24:446:57
1814.24:466:55
1914.14:486:53
2014.04:496:51
2114.04:516:49
2213.94:526:47
2313.94:546:45
2413.84:556:43
2513.74:576:41
2613.74:586:39
2713.65:006:37
2813.65:016:35
2913.55:036:32
3013.45:046:30
3113.45:066:28

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.61 kWh/m².

For context, solar energy here swings from a low near 0.75 kWh/m² to a high of 5.32 kWh/m² in June across the year — August's 4.61 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.7Bright
164.6Bright
174.6Bright
184.6Bright
194.5Bright
204.5Bright
214.4Bright
224.4Bright
234.3Bright
244.3Bright
254.2Bright
264.2Bright
274.1Bright
284.0Bright
294.0Moderate
303.9Moderate
313.9Moderate
Planning a trip in August

Is August a good time to visit Ostrava?

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

6.7
Sightseeing
1st-best month of the year
5.3
Beach & pool
1st-best month of the year

August is a reasonable time to visit Ostrava for sightseeing.

What to pack for Ostrava in August

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

In August, Ostrava sees daytime highs around 24°C and nights near 13°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Ostrava in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ostrava 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 Ostrava in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Ostrava is worst in June — around 24 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 15 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Ostrava's WHO annual average of 20.3 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1624 µg/m³Dec 1415 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar23Moderate
Apr23Moderate
May23Moderate
Jun24Moderate
Jul23Moderate
Aug23Moderate
Sep20Moderate
Oct17Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Ostrava?

Ostrava sits at 49.8°N, 18.3°E, 211 m above sea level, in Czechia. The nearest listed city is Bohumín, 9.0 km away.

Topography around Ostrava

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

Within 3 km, the terrain around Ostrava has only modest variations in elevation — a maximum elevation change of 118 m around an average of 226 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 216 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,334 m.

The land around Ostrava is covered by artificial surfaces (49%) and trees (43%) within 3 km, trees (43%) and cropland (28%) within 16 km, and trees (50%) and cropland (29%) within 80 km.

3 km
118 m
16 km
216 m
80 km
1,334 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Bohumín 9.0 km · Starý Bohumín 10 km · Orlová 11 km · Havířov 13 km · Frýdek-Místek 18 km · Karviná 19 km · Wodzisław Śląski 23 km · Jastrzębie Zdrój 25 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 Ostrava (49.8347°, 18.282°, elevation 211 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).