Ostrov climate — normals and trends
Ostrov (Czechia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.6 °C and it receives 730 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 (16.2 °C on average) and the coldest is January (-3.2 °C). Rainfall peaks in July.
Ostrov averages 125 frost days, 2 hot days (≥ 30 °C) and 146 rainy days per year.
Ostrov has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 145 to 105 per year over the period.
The hottest day of the period reached 34.8 °C (on 13 August 2003) and the coldest -27.2 °C (on 2 February 1956).
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
OstrovCarlsbad Region
- coords
- 50.31°, 12.94°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.6°C
Average daily high
10.2°C
Average daily low
3.0°C
Annual rainfall
730mm
Sunshine / day
7.4h
Mean relative humidity
81%
Average peak wind
16.3km/h
Seasonal range
19.4°C
Frost days (< 0 °C)
125 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
146 d/yr
Annual snowfall
99.2 cm
Average feels-like high
7.5 °C
Average feels-like low
0.0 °C
Average peak gust
36.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.47 · 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
34.8 °C
13 August 2003
Coldest day
-27.2 °C
2 February 1956
Wettest day
65 mm
3 August 1983
Windiest day
49.1 km/h
18 January 2007
Strongest gust
137.5 km/h
18 January 2007
Hottest feels-like
37.7 °C
21 August 1943
Coldest feels-like
-32.6 °C
2 February 1956
Snowiest day
20.2 cm
29 November 2012
Sunniest day
15.9 h
13 June 2009
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 | 2.5 °C | +3.5 °C | 62 mm | +14 mm |
| Feb | 1.3 °C | +0.7 °C | 13 mm | -31 mm |
| Mar | 9.6 °C | +4.4 °C | 25 mm | -26 mm |
| Apr | 14.4 °C | +3.7 °C | 48 mm | -6 mm |
| May | 16.1 °C | +0.6 °C | 54 mm | -23 mm |
| Jun | 23.1 °C | +4.2 °C | 47 mm | -38 mm |
| Jul | 21.9 °C | +1.2 °C | 117 mm | +29 mm |
| Aug | 23.4 °C | +2.8 °C | 40 mm | -40 mm |
| Sep | 18.0 °C | +1.5 °C | 93 mm | +37 mm |
| Oct | 10.3 °C | -0.4 °C | 58 mm | +12 mm |
| Nov | 4.9 °C | +0.8 °C | 31 mm | -17 mm |
| Dec | 2.6 °C | +2.1 °C | 20 mm | -33 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 Ostrov?
Ostrov has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.6 °C and it receives 730 mm of precipitation per year.
What is the hottest day ever recorded in Ostrov?
The hottest day measured in Ostrov between 1940 and 2025 was 13 August 2003, reaching 34.8 °C.
What is the coldest day in Ostrov?
The coldest day measured in Ostrov between 1940 and 2025 was 2 February 1956, at -27.2 °C.
Does it snow in Ostrov?
Yes. Ostrov gets on average 99.2 cm of snow per year and has around 125 frost days.
Has the climate of Ostrov warmed?
Yes: Ostrov warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ostrov?
The wettest day measured in Ostrov between 1940 and 2025 was 3 August 1983, with 65 mm of rain in 24 hours.
What was the windiest day in Ostrov?
The windiest day measured in Ostrov between 1940 and 2025 was 18 January 2007, with winds reaching 49.1 km/h.
What is the warmest month in Ostrov?
The warmest month in Ostrov is July (16.2 °C on average); the coldest is January (-3.2 °C).
How much does it rain in Ostrov?
Ostrov receives on average 730 mm of precipitation per year, spread over about 146 rainy days.
Is it sunny in Ostrov?
Ostrov gets on average 7.4 hours of sunshine per day, roughly 2,701 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ostrov?
The heaviest 24-hour snowfall measured in Ostrov between 1940 and 2025 was 29 November 2012, with 20.2 cm.
Are there tropical nights in Ostrov?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ostrov.
What was the most extreme apparent temperature in Ostrov?
In Ostrov, between 1940 and 2025, the highest apparent temperature reached 37.7 °C on 21 August 1943, and the lowest was -32.6 °C on 2 February 1956.
Compare Ostrov with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ostrov