Weather in Brno in August 2025
- August is usually the hottest month of the year in Brno;
Average weather
Average temperature in Brno in August
Going from a maximum of +34°C during the day to a minimum of +10°C during the night, the temperature in August averages around +26°C.
The average maximum temperature goes up 21% by the end of the month, compared with the beginning of the month, from +18°C to +23°C.
Is Brno warm or cold in August?
Brno is typically warm in August.
Maximum temperatures go up compared to the previous month from +25°C to +25°C. The minimum temperature also goes up from +15°C to +15°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the hottest month in Brno, here is the comparison with other months:
Climate in Brno in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +25°C | +25°C | +20°C | ||||
| Min. temperature | ||||||
| +6°C | +4°C | +1°C | ||||
| Max. temperature | ||||||
| +38°C | +36°C | +32°C | ||||
| Rainfall | ||||||
| 85 mm | 78 mm | 60 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 69% | 70% | 76% | ||||
| Air pressure | ||||||
| 1014 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 7 | 9 | 8 | ||||
| Cloudy days | ||||||
| 4 | 4 | 8 | ||||
| Rainy days | ||||||
| 17 | 16 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. The temperature levels stay the same in the area of +25°C for average maximum temperature during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 85 mm to 78 mm. Humidity rises from 69% to 70%. The average wind speed doesn’t change much during August, staying around 2 m/s. The good news is there are likely to be more sunny days in August, from 7 to 9.
Next month (September) brings a further decline in the weather.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Brno is gradually increasing during August, going from 3 m/s to 3 m/s over the course of the month.
Rain
How was the weather last August in Brno?
Climate Change over Years
The climate in Brno in August has not changed much over the last 43 years.
The average temperature was the lowest in 1996 (+11°C) and the highest in 2023 (+16°C). The driest year was 1983 with only 359 mm of rainfall, and the wettest year was 2021 with 1029 mm.
FAQ
Is August a good time to visit Brno?
Can you sunbathe in Brno in August?
Is Brno rainy in August?
Is it sunny in Brno in August?
Other cities in Czech Republic
Monthly weather in Brno
Source of the data
For this page, we’ve looked at the typical weather in Brno, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.