Ostrava climate
Ostrava (Czechia) has a warm-summer humid continental climate (Köppen Dfb). The average temperature over the year is 9 °C49 °F, and about 704 mm28 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Ostrava climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 033 | −621 | −327 | 411.6 | 28 |
| Feb | 337 | −524 | −130 | 381.5 | 25 |
| Mar | 846 | −130 | 338 | 421.7 | 20 |
| Apr | 1559 | 439 | 949 | 461.8 | 6 |
| May | 2067 | 948 | 1458 | 843.3 | 0 |
| Jun | 2474 | 1356 | 1865 | 883.5 | 0 |
| Jul | 2679 | 1559 | 2169 | 873.4 | 0 |
| Aug | 2679 | 1558 | 2069 | 732.9 | 0 |
| Sep | 2069 | 1049 | 1559 | 722.8 | 0 |
| Oct | 1457 | 540 | 949 | 532.1 | 4 |
| Nov | 846 | 134 | 440 | 411.6 | 12 |
| Dec | 236 | −425 | −130 | 391.5 | 26 |
| Year | 2679 | −621 | 949 | 70428 | 121 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 93% | 81% | 0.9 | 8:33 |
| Feb | 90% | 80% | 1.6 | 10:01 |
| Mar | 83% | 72% | 2.8 | 11:44 |
| Apr | 76% | 65% | 4.1 | 13:41 |
| May | 75% | 69% | 4.8 | 15:22 |
| Jun | 71% | 69% | 5.2 | 16:19 |
| Jul | 67% | 64% | 5.1 | 15:55 |
| Aug | 66% | 59% | 4.6 | 14:26 |
| Sep | 72% | 64% | 3.2 | 12:31 |
| Oct | 82% | 70% | 2.0 | 10:38 |
| Nov | 89% | 78% | 1.0 | 8:58 |
| Dec | 93% | 81% | 0.7 | 8:07 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Ostrava is like
The warmest month is July, with an average high of 26 °C79 °F and a low of 15 °C59 °F. The coldest is January, when highs average 0 °C33 °F and lows −6 °C21 °F. Seasons are strongly marked: the warmest month is on average 23.3 °C42 °F warmer than the coldest.
Annual precipitation is moderate at about 704 mm28 in. The wettest three-month stretch is May–July, which brings 37% of the annual total. The wettest month is June (88 mm3.5 in), the driest is February (38 mm1.5 in).
Relative humidity ranges from 66% in August to 93% in January. The clearest skies (lowest average cloud amount, 59%) are typical of August. Average wind speed near the ground ranges from 8 km/h (5 mph) in August to 12 km/h (7 mph) in January. Daylight lasts from about 8.1 hours in December to 16.3 hours in June.
A lasting snow cover is typical in December–February, when the average snow depth in the reanalysis exceeds 10 cm (deepest in January, about 18 cm).
Best time to visit Ostrava
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September: average highs of 20 °C69 °F to 26 °C79 °F with 72 mm2.8 in to 88 mm3.5 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 0 °C33 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Ostrava
- Winter (December–February) — highs 033 to 3 °C37 °F, lows −621 to −4 °C25 °F, about 39 mm1.5 in of precipitation a month. Pack a winter coat, hat, gloves and warm, non-slip boots and shoes with good grip, as frost is common.
- Spring (March–May) — highs 846 to 20 °C67 °F, lows −130 to 9 °C48 °F, about 57 mm2.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 2474 to 26 °C79 °F, lows 1356 to 15 °C59 °F, about 82 mm3.2 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 846 to 20 °C69 °F, lows 134 to 10 °C49 °F, about 55 mm2.2 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Ostrava compares
Compared with Katowice, about 71 km to the northeast, Ostrava is on average 0.6 °C1 °F warmer and receives a similar amount of precipitation. The difference is largest in March (0.8 °C1.5 °F warmer).
Of the 5 places in Czechia covered by World Climates, Ostrava is the 4th warmest by annual mean temperature and the 3rd wettest by annual precipitation. See all of them on the Czechia climate page.
Places in other countries with the most similar temperature and rainfall pattern: Gliwice (Poland, Dfb), Opole (Poland, Dfb) and Kraków (Poland, Dfb).
Nearby places
- Rybnik 35 km · 9 °C48 °F · 796 mm31 in
- Bielsko-Biala 55 km · 8 °C47 °F · 796 mm31 in
- Gliwice 59 km · 9 °C49 °F · 716 mm28 in
- Katowice 71 km · 9 °C48 °F · 716 mm28 in
- Žilina 76 km · 9 °C48 °F · 840 mm33 in
- Sosnowiec 77 km · 9 °C48 °F · 714 mm28 in
- Opole 96 km · 9 °C49 °F · 670 mm26 in
- Kraków 121 km · 9 °C49 °F · 786 mm31 in
Frequently asked questions
What is the warmest month in Ostrava?
July is the warmest month in Ostrava, with an average high of 26 °C (79 °F) and an average low of 15 °C (59 °F).
What is the coldest month in Ostrava?
January is the coldest month, with an average high of 0 °C (33 °F) and an average low of -6 °C (21 °F).
When does it rain the most in Ostrava?
June is the wettest month with about 88 mm (3.5 in) of precipitation; February is the driest with about 38 mm (1.5 in).
What is the best time to visit Ostrava?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 299 m, while Ostrava lies at about 211 m. Temperatures on this page were therefore adjusted by +0.6 °C1 °F using the standard lapse rate of 6.5 °C per 1,000 m.