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Ostrava, Czechia climate
Cfb Oceanic / temperate
Ostrava has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 25°C, while the coldest is January averaging around −4°C at night. Around 658 mm of precipitation falls each year, peaking in June (89 mm) and easing off in February (26 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Ostrava climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 4 | 9 | 15 | 20 | 23 | 25 | 25 | 20 | 14 | 8 | 3 |
| Avg temp (°C) | −1 | 0 | 4 | 9 | 14 | 17 | 19 | 19 | 14 | 9 | 5 | 0 |
| Avg low (°C) | −4 | −4 | −1 | 3 | 8 | 11 | 13 | 13 | 9 | 5 | 1 | −3 |
| Precipitation (mm) | 28 | 26 | 33 | 43 | 79 | 89 | 85 | 69 | 75 | 52 | 47 | 32 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 4 | 9 | 15 | 20 | 23 |
| Avg temp (°C) | −1 | 0 | 4 | 9 | 14 | 17 |
| Avg low (°C) | −4 | −4 | −1 | 3 | 8 | 11 |
| Precipitation (mm) | 28 | 26 | 33 | 43 | 79 | 89 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 25 | 20 | 14 | 8 | 3 |
| Avg temp (°C) | 19 | 19 | 14 | 9 | 5 | 0 |
| Avg low (°C) | 13 | 13 | 9 | 5 | 1 | −3 |
| Precipitation (mm) | 85 | 69 | 75 | 52 | 47 | 32 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 74 | 71 | 67 | 69 | 69 | 65 | 61 | 66 | 70 | 74 | 73 |
| Relative humidity (%) | 95 | 93 | 86 | 79 | 78 | 75 | 70 | 68 | 75 | 84 | 91 | 95 |
| Wind speed (mph) | 6.9 | 6.8 | 6.5 | 5.5 | 5.2 | 4.7 | 4.6 | 4.4 | 4.9 | 5.5 | 6.2 | 6.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 74 | 71 | 67 | 69 | 69 |
| Relative humidity (%) | 95 | 93 | 86 | 79 | 78 | 75 |
| Wind speed (mph) | 6.9 | 6.8 | 6.5 | 5.5 | 5.2 | 4.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 61 | 66 | 70 | 74 | 73 |
| Relative humidity (%) | 70 | 68 | 75 | 84 | 91 | 95 |
| Wind speed (mph) | 4.6 | 4.4 | 4.9 | 5.5 | 6.2 | 6.7 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Mosnov, a weather station, about 20 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.