Brno climate — normals and trends
Brno (Czechia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.5 °C and it receives 616 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 (18.6 °C on average) and the coldest is January (-2.3 °C). Rainfall peaks in July.
Brno averages 99 frost days, 5 hot days (≥ 30 °C) and 122 rainy days per year.
Brno has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.
The number of frost days there went from about 118 to 80 per year over the period.
The hottest day of the period reached 36.8 °C (on 5 July 1957) and the coldest -26.1 °C (on 9 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
BrnoSouth Moravian
- coords
- 49.20°, 16.61°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.5°C
Average daily high
12.2°C
Average daily low
5.0°C
Annual rainfall
616mm
Sunshine / day
7.9h
Mean relative humidity
76%
Average peak wind
16.7km/h
Seasonal range
20.9°C
Frost days (< 0 °C)
99 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
122 d/yr
Annual snowfall
58.7 cm
Average feels-like high
9.7 °C
Average feels-like low
2.0 °C
Average peak gust
35.5 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
11.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.49 · 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
36.8 °C
5 July 1957
Coldest day
-26.1 °C
9 February 1956
Wettest day
57 mm
13 September 2024
Windiest day
44.5 km/h
1 March 1990
Strongest gust
112.0 km/h
29 October 2017
Hottest feels-like
38.1 °C
5 July 1957
Coldest feels-like
-32.8 °C
9 February 1956
Snowiest day
17.2 cm
3 January 1941
Sunniest day
15.9 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 | 2.4 °C | +2.4 °C | 24 mm | -10 mm |
| Feb | 2.7 °C | +0.5 °C | 12 mm | -21 mm |
| Mar | 11.3 °C | +4.2 °C | 47 mm | +9 mm |
| Apr | 15.7 °C | +2.7 °C | 33 mm | -13 mm |
| May | 16.8 °C | -1.0 °C | 32 mm | -36 mm |
| Jun | 24.6 °C | +3.3 °C | 52 mm | -26 mm |
| Jul | 23.6 °C | +0.2 °C | 112 mm | +32 mm |
| Aug | 24.5 °C | +1.3 °C | 34 mm | -31 mm |
| Sep | 19.4 °C | +0.7 °C | 102 mm | +49 mm |
| Oct | 12.0 °C | -0.6 °C | 26 mm | -12 mm |
| Nov | 5.7 °C | -0.2 °C | 51 mm | +6 mm |
| Dec | 2.7 °C | +1.2 °C | 33 mm | -5 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 Brno?
Brno has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.5 °C and it receives 616 mm of precipitation per year.
What is the hottest day ever recorded in Brno?
The hottest day measured in Brno between 1940 and 2025 was 5 July 1957, reaching 36.8 °C.
What is the coldest day in Brno?
The coldest day measured in Brno between 1940 and 2025 was 9 February 1956, at -26.1 °C.
Does it snow in Brno?
Yes. Brno gets on average 58.7 cm of snow per year and has around 99 frost days.
Has the climate of Brno warmed?
Yes: Brno warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Brno?
The wettest day measured in Brno between 1940 and 2025 was 13 September 2024, with 57 mm of rain in 24 hours.
What was the windiest day in Brno?
The windiest day measured in Brno between 1940 and 2025 was 1 March 1990, with winds reaching 44.5 km/h.
What is the warmest month in Brno?
The warmest month in Brno is July (18.6 °C on average); the coldest is January (-2.3 °C).
How much does it rain in Brno?
Brno receives on average 616 mm of precipitation per year, spread over about 122 rainy days.
Is it sunny in Brno?
Brno gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Brno?
The heaviest 24-hour snowfall measured in Brno between 1940 and 2025 was 3 January 1941, with 17.2 cm.
Are there tropical nights in Brno?
Yes: Brno has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Brno?
In Brno, between 1940 and 2025, the highest apparent temperature reached 38.1 °C on 5 July 1957, and the lowest was -32.8 °C on 9 February 1956.
Compare Brno with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Brno