Ostrava climate
Ostrava is warmest in August, with average highs of 24 °C, and coldest in January, when nights average -4.1 °C. July is the wettest month (112 mm) and February the driest (46 mm). Figures are 1991–2020 climate normals.
Across a full year Ostrava averages 833 mm of rain, 34 days above 25 °C and 96 days below freezing.
Czechia · population 279,791 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month August 24 °C
- Coldest month January -4.1 °C
- Driest month February 46 mm
- Wettest month July 112 mm
- Least cloud August 53 % cloud
- Hottest on record August 36 °C
- Coldest on record December -29 °C
What to expectOstrava through the year
Ostrava has a clear annual cycle: average daily highs run from 1.4 °C in January to 24 °C in August, a swing of 21 °C in mean temperature across the year.
Counted across a normal year, 34 days a year reach 25 °C, 5 of them reach 30 °C, 96 nights drop below freezing. The warmest reading in the 1991–2020 record is 36 °C, in August.
Rain is strongly seasonal. July averages 112 mm against 46 mm in February — 2.5 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 1.4 °C | 47 mm | 75 % |
| February | 3.3 °C | 46 mm | 73 % |
| March | 8.0 °C | 55 mm | 66 % |
| April | 14.0 °C | 58 mm | 59 % |
| May | 18.3 °C | 90 mm | 62 % |
| June | 21.7 °C | 99 mm | 60 % |
| July | 23.7 °C | 112 mm | 56 % |
| August | 23.9 °C | 84 mm | 53 % |
| September | 18.7 °C | 82 mm | 61 % |
| October | 13.3 °C | 59 mm | 67 % |
| November | 7.7 °C | 53 mm | 76 % |
| December | 2.5 °C | 48 mm | 77 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 1.4 °C | -4.1 °C | -1.3 °C | 12.3 °C | -26.4 °C | 0 | 0 | 23 |
| February | 3.3 °C | -3.6 °C | -0.1 °C | 14.5 °C | -22.7 °C | 0 | 0 | 20 |
| March | 8.0 °C | -0.6 °C | 3.7 °C | 19.2 °C | -18.7 °C | 0 | 0 | 17 |
| April | 14.0 °C | 3.7 °C | 9.2 °C | 27.1 °C | -10.8 °C | 0 | 0 | 5 |
| May | 18.3 °C | 8.6 °C | 13.8 °C | 29.5 °C | -1.5 °C | 2 | 0 | 0 |
| June | 21.7 °C | 12.4 °C | 17.4 °C | 32.2 °C | 3.7 °C | 6 | 1 | 0 |
| July | 23.7 °C | 14.5 °C | 19.4 °C | 34.1 °C | 6.3 °C | 12 | 2 | 0 |
| August | 23.9 °C | 14.4 °C | 19.3 °C | 35.8 °C | 6.8 °C | 12 | 3 | 0 |
| September | 18.7 °C | 10.3 °C | 14.5 °C | 32.7 °C | 1.4 °C | 2 | 0 | 0 |
| October | 13.3 °C | 6.2 °C | 9.7 °C | 24.2 °C | -4.7 °C | 0 | 0 | 2 |
| November | 7.7 °C | 2.1 °C | 4.9 °C | 19.7 °C | -13.1 °C | 0 | 0 | 9 |
| December | 2.5 °C | -2.4 °C | 0.1 °C | 14.1 °C | -28.9 °C | 0 | 0 | 20 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 47 mm | 11 | 8.6 h/day | 75 % | 83 % | 20 km/h |
| February | 46 mm | 11 | 10 h/day | 73 % | 80 % | 19 km/h |
| March | 55 mm | 12 | 12 h/day | 66 % | 76 % | 19 km/h |
| April | 58 mm | 10 | 14 h/day | 59 % | 71 % | 17 km/h |
| May | 90 mm | 14 | 15 h/day | 62 % | 73 % | 17 km/h |
| June | 99 mm | 13 | 16 h/day | 60 % | 74 % | 16 km/h |
| July | 112 mm | 14 | 16 h/day | 56 % | 73 % | 15 km/h |
| August | 84 mm | 11 | 14 h/day | 53 % | 72 % | 14 km/h |
| September | 82 mm | 10 | 13 h/day | 61 % | 76 % | 16 km/h |
| October | 59 mm | 10 | 11 h/day | 67 % | 80 % | 18 km/h |
| November | 53 mm | 10 | 9.1 h/day | 76 % | 84 % | 18 km/h |
| December | 48 mm | 11 | 8.1 h/day | 77 % | 84 % | 20 km/h |
How Ostrava compares
The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.
| Destination | Summer high | Winter low | Rain per year | Days above 25 °C |
|---|---|---|---|---|
| Ostrava | 24 °C | -4.1 °C | 833 mm | 34 |
| Bielsko-Biala · Poland | 23 °C | -4.9 °C | 1,086 mm | 26 |
| Gliwice · Poland | 24 °C | -4.1 °C | 750 mm | 35 |
| Katowice · Poland | 23 °C | -4.5 °C | 747 mm | 31 |
Planning a trip? See the best time to visit Ostrava.
QuestionsCommon questions about Ostrava’s climate
When is the best time to visit Ostrava?
That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, August is the warmest month and February the driest. The month-by-month table above has the full picture.
How hot does Ostrava get?
In August, the warmest month, daily highs average 24 °C. About 5 days a year pass 30 °C. The highest value in the 1991–2020 record is 36 °C.
How cold does it get in winter?
Nights average -4.1 °C in January, the coldest month. A normal year has 96 nights below freezing.
Which month is wettest in Ostrava?
July, averaging 112 mm over 14 days with rain. The driest month is February with 46 mm. The year as a whole averages 833 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Ostrava rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Data point
- 49.835°, 18.282° (the coordinates the reanalysis values are taken for)
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.