Blatná climate — normals and trends
Blatná (Czechia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.9 °C and it receives 705 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 (17.4 °C on average) and the coldest is January (-2.1 °C). Rainfall peaks in July.
Blatná averages 104 frost days, 3 hot days (≥ 30 °C) and 140 rainy days per year.
Blatná has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The number of frost days there went from about 124 to 84 per year over the period.
The hottest day of the period reached 35.6 °C (on 13 August 2003) and the coldest -32.1 °C (on 10 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
BlatnáSouth Bohemian Region
- coords
- 49.42°, 13.88°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.9°C
Average daily high
11.7°C
Average daily low
4.2°C
Annual rainfall
705mm
Sunshine / day
7.8h
Mean relative humidity
79%
Average peak wind
15.5km/h
Seasonal range
19.5°C
Frost days (< 0 °C)
104 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
140 d/yr
Annual snowfall
70.6 cm
Average feels-like high
9.2 °C
Average feels-like low
1.3 °C
Average peak gust
33.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.48 · 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
35.6 °C
13 August 2003
Coldest day
-32.1 °C
10 February 1956
Wettest day
90 mm
12 August 2002
Windiest day
49.4 km/h
1 March 1990
Strongest gust
128.2 km/h
19 January 2007
Hottest feels-like
39.1 °C
20 August 1943
Coldest feels-like
-36.6 °C
10 February 1956
Snowiest day
21.0 cm
26 November 1969
Sunniest day
15.9 h
22 June 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 | 3.1 °C | +2.8 °C | 42 mm | +3 mm |
| Feb | 3.3 °C | +1.1 °C | 17 mm | -23 mm |
| Mar | 10.6 °C | +3.6 °C | 43 mm | -4 mm |
| Apr | 15.7 °C | +3.4 °C | 41 mm | -14 mm |
| May | 16.4 °C | -0.5 °C | 57 mm | -22 mm |
| Jun | 23.9 °C | +3.6 °C | 51 mm | -37 mm |
| Jul | 22.7 °C | +0.6 °C | 92 mm | +4 mm |
| Aug | 23.9 °C | +1.9 °C | 66 mm | -14 mm |
| Sep | 18.7 °C | +0.8 °C | 84 mm | +28 mm |
| Oct | 11.4 °C | -0.7 °C | 44 mm | -0 mm |
| Nov | 5.7 °C | +0.2 °C | 54 mm | +10 mm |
| Dec | 3.0 °C | +1.4 °C | 18 mm | -26 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 Blatná?
Blatná has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.9 °C and it receives 705 mm of precipitation per year.
What is the hottest day ever recorded in Blatná?
The hottest day measured in Blatná between 1940 and 2025 was 13 August 2003, reaching 35.6 °C.
What is the coldest day in Blatná?
The coldest day measured in Blatná between 1940 and 2025 was 10 February 1956, at -32.1 °C.
Does it snow in Blatná?
Yes. Blatná gets on average 70.6 cm of snow per year and has around 104 frost days.
Has the climate of Blatná warmed?
Yes: Blatná warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Blatná?
The wettest day measured in Blatná between 1940 and 2025 was 12 August 2002, with 90 mm of rain in 24 hours.
What was the windiest day in Blatná?
The windiest day measured in Blatná between 1940 and 2025 was 1 March 1990, with winds reaching 49.4 km/h.
What is the warmest month in Blatná?
The warmest month in Blatná is July (17.4 °C on average); the coldest is January (-2.1 °C).
How much does it rain in Blatná?
Blatná receives on average 705 mm of precipitation per year, spread over about 140 rainy days.
Is it sunny in Blatná?
Blatná gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Blatná?
The heaviest 24-hour snowfall measured in Blatná between 1940 and 2025 was 26 November 1969, with 21.0 cm.
Are there tropical nights in Blatná?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Blatná.
What was the most extreme apparent temperature in Blatná?
In Blatná, between 1940 and 2025, the highest apparent temperature reached 39.1 °C on 20 August 1943, and the lowest was -36.6 °C on 10 February 1956.
Compare Blatná with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Blatná