Climate averages 1991–2020
Brno weather
in August.
A warm, moderately wet month: the 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Brno: daytime highs average 24.9°C and nights cool to about 15.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 69 mm of rain on roughly 10 days, which makes August a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 24 min on an average August day.
The nearest other city in this atlas is Olomouc (64 km away). In August its highs average 24.3°C, 0.6°C cooler than Brno, with 71 mm of rain.
Among the 12 cities listed in Czechia, Brno ranks 1st of 12 for the warmest August highs and joint 2nd of 12 for the driest August (rainfall, lowest first). The mean August high of those 12 cities is 23.9°C; Brno is 1.0°C warmer than that mean.
From August to September, average highs fall by 5.4°C to 19.5°C, and monthly rainfall falls from 69 mm to 64 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Brno climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.9°C-3.7°C | -3.7°C | 33 | 8.8 | 8.79 h |
| February | 4.3°C-2.9°C | -2.9°C | 28 | 7.3 | 10.110 h |
| March | 8.9°C0.2°C | 0.2°C | 40 | 8.8 | 11.912 h |
| April | 14.8°C4.7°C | 4.7°C | 40 | 9.1 | 13.714 h |
| May | 19.2°C9.7°C | 9.7°C | 65 | 12.4 | 15.315 h |
| June | 22.8°C13.4°C | 13.4°C | 75 | 12.3 | 16.216 h |
| July | 25.0°C15.5°C | 15.5°C | 84 | 13.0 | 15.816 h |
| August, selected | 24.9°C15.3°C | 15.3°C | 69 | 10.4 | 14.414 h |
| September | 19.5°C11.0°C | 11.0°C | 64 | 9.5 | 12.713 h |
| October | 13.6°C6.4°C | 6.4°C | 44 | 8.9 | 10.811 h |
| November | 7.5°C2.3°C | 2.3°C | 41 | 9.0 | 9.29 h |
| December | 2.6°C-2.3°C | -2.3°C | 36 | 9.0 | 8.38 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Olomouc in AugustCzechia · 64 kmHigh 24.3°C · Low 14.5°C · 71 mm rain
- Zlín in AugustCzechia · 77 kmHigh 24.3°C · Low 15.0°C · 80 mm rain
- Vienna in AugustAustria · 111 kmHigh 25.7°C · Low 16.0°C · 71 mm rain
- Pardubice in AugustCzechia · 111 kmHigh 24.0°C · Low 14.4°C · 77 mm rain
- Bratislava in AugustSlovakia · 122 kmHigh 26.1°C · Low 16.4°C · 67 mm rain
- Hradec Králové in AugustCzechia · 126 kmHigh 23.8°C · Low 14.3°C · 65 mm rain
- Ostrava in AugustCzechia · 140 kmHigh 23.9°C · Low 14.5°C · 85 mm rain
- Nitra in AugustSlovakia · 146 kmHigh 26.4°C · Low 16.3°C · 62 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Brno) is explained once on the Brno year overview and on the Sources, method and limits page.