Ostrava climate — normals and trends
Ostrava (Czechia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.2 °C and it receives 839 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (18.0 °C on average) and the coldest is January (-2.5 °C). Rainfall peaks in July.
Ostrava averages 100 frost days, 3 hot days (≥ 30 °C) and 149 rainy days per year.
Ostrava has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 121 to 79 per year over the period.
The hottest day of the period reached 36.6 °C (on 8 August 2013) and the coldest -29.1 °C (on 11 January 1940).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
OstravaMoravian-Silesian Region
- coords
- 49.83°, 18.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.2°C
Average daily high
12.0°C
Average daily low
4.5°C
Annual rainfall
839mm
Sunshine / day
7.6h
Mean relative humidity
79%
Average peak wind
16.8km/h
Seasonal range
20.5°C
Frost days (< 0 °C)
100 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
149 d/yr
Annual snowfall
95.9 cm
Average feels-like high
9.5 °C
Average feels-like low
1.6 °C
Average peak gust
36.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.56 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
36.6 °C
8 August 2013
Coldest day
-29.1 °C
11 January 1940
Wettest day
94 mm
6 July 1997
Windiest day
43.5 km/h
21 March 2008
Strongest gust
109.8 km/h
19 January 2007
Hottest feels-like
37.6 °C
8 July 1957
Coldest feels-like
-34.3 °C
9 February 1956
Snowiest day
21.8 cm
3 April 1970
Sunniest day
15.6 h
2 July 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 4.3 °C | +4.5 °C | 44 mm | -3 mm |
| Feb | 3.8 °C | +1.9 °C | 16 mm | -33 mm |
| Mar | 11.7 °C | +5.0 °C | 51 mm | -1 mm |
| Apr | 15.8 °C | +3.1 °C | 31 mm | -33 mm |
| May | 16.0 °C | -1.5 °C | 80 mm | -11 mm |
| Jun | 23.8 °C | +3.0 °C | 75 mm | -26 mm |
| Jul | 23.5 °C | +0.9 °C | 185 mm | +74 mm |
| Aug | 24.0 °C | +1.4 °C | 54 mm | -35 mm |
| Sep | 19.4 °C | +1.1 °C | 136 mm | +65 mm |
| Oct | 11.8 °C | -1.1 °C | 72 mm | +20 mm |
| Nov | 6.7 °C | +0.4 °C | 93 mm | +35 mm |
| Dec | 3.8 °C | +2.1 °C | 15 mm | -38 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Ostrava?
Ostrava has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.2 °C and it receives 839 mm of precipitation per year.
What is the hottest day ever recorded in Ostrava?
The hottest day measured in Ostrava between 1940 and 2025 was 8 August 2013, reaching 36.6 °C.
What is the coldest day in Ostrava?
The coldest day measured in Ostrava between 1940 and 2025 was 11 January 1940, at -29.1 °C.
Does it snow in Ostrava?
Yes. Ostrava gets on average 95.9 cm of snow per year and has around 100 frost days.
Has the climate of Ostrava warmed?
Yes: Ostrava warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ostrava?
The wettest day measured in Ostrava between 1940 and 2025 was 6 July 1997, with 94 mm of rain in 24 hours.
What was the windiest day in Ostrava?
The windiest day measured in Ostrava between 1940 and 2025 was 21 March 2008, with winds reaching 43.5 km/h.
What is the warmest month in Ostrava?
The warmest month in Ostrava is July (18.0 °C on average); the coldest is January (-2.5 °C).
How much does it rain in Ostrava?
Ostrava receives on average 839 mm of precipitation per year, spread over about 149 rainy days.
Is it sunny in Ostrava?
Ostrava gets on average 7.6 hours of sunshine per day, roughly 2,774 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ostrava?
The heaviest 24-hour snowfall measured in Ostrava between 1940 and 2025 was 3 April 1970, with 21.8 cm.
Are there tropical nights in Ostrava?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ostrava.
What was the most extreme apparent temperature in Ostrava?
In Ostrava, between 1940 and 2025, the highest apparent temperature reached 37.6 °C on 8 July 1957, and the lowest was -34.3 °C on 9 February 1956.
Compare Ostrava with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ostrava