Climate averages 1991–2020
Ostrava weather
in August.
A warm, moderately wet month: the warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Ostrava: daytime highs average 23.9°C and nights cool to about 14.5°C. By daytime temperature it is the warmest month of the year.
Expect about 85 mm of rain on roughly 12 days, which makes August a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 28 min on an average August day.
The nearest other city in this atlas is Havířov (13 km away). In August its highs average 23.4°C, about as warm as Ostrava, with 91 mm of rain.
Among the 12 cities listed in Czechia, Ostrava ranks joint 6th of 12 for the warmest August highs and joint 9th of 12 for the driest August (rainfall, lowest first). The mean August high of those 12 cities is 23.9°C; Ostrava is level with that mean.
From August to September, average highs fall by 5.1°C to 18.7°C, and monthly rainfall falls from 85 mm to 82 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ostrava climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.4°C-4.0°C | -4.0°C | 47 | 11.1 | 8.69 h |
| February | 3.3°C-3.5°C | -3.5°C | 46 | 11.0 | 10.110 h |
| March | 8.0°C-0.5°C | -0.5°C | 55 | 12.1 | 11.812 h |
| April | 14.0°C3.8°C | 3.8°C | 57 | 10.8 | 13.714 h |
| May | 18.4°C8.8°C | 8.8°C | 90 | 14.0 | 15.415 h |
| June | 21.7°C12.6°C | 12.6°C | 100 | 13.5 | 16.316 h |
| July | 23.7°C14.7°C | 14.7°C | 114 | 14.2 | 15.916 h |
| August, selected | 23.9°C14.5°C | 14.5°C | 85 | 11.7 | 14.514 h |
| September | 18.7°C10.4°C | 10.4°C | 82 | 11.0 | 12.713 h |
| October | 13.3°C6.3°C | 6.3°C | 59 | 10.3 | 10.811 h |
| November | 7.7°C2.3°C | 2.3°C | 53 | 10.5 | 9.19 h |
| December | 2.5°C-2.3°C | -2.3°C | 49 | 11.1 | 8.28 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Havířov in AugustCzechia · 13 kmHigh 23.4°C · Low 14.1°C · 91 mm rain
- Jastrzębie Zdrój in AugustPoland · 25 kmHigh 23.5°C · Low 14.5°C · 75 mm rain
- Rybnik in AugustPoland · 35 kmHigh 23.8°C · Low 14.4°C · 75 mm rain
- Bielsko-Biala in AugustPoland · 55 kmHigh 22.9°C · Low 14.0°C · 106 mm rain
- Gliwice in AugustPoland · 59 kmHigh 23.9°C · Low 14.9°C · 74 mm rain
- Tychy in AugustPoland · 59 kmHigh 23.3°C · Low 14.3°C · 71 mm rain
- Zabrze in AugustPoland · 65 kmHigh 23.6°C · Low 14.6°C · 74 mm rain
- Katowice in AugustPoland · 71 kmHigh 23.4°C · Low 14.5°C · 71 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ostrava) is explained once on the Ostrava year overview and on the Sources, method and limits page.