Brno climate
Brno (Czechia) has a warm-summer humid continental climate (Köppen Dfb). The average temperature over the year is 10 °C49 °F, and about 590 mm23 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Brno climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 134 | −622 | −228 | 371.5 | 28 |
| Feb | 438 | −424 | 031 | 331.3 | 24 |
| Mar | 948 | −130 | 439 | 361.4 | 18 |
| Apr | 1661 | 439 | 1050 | 341.3 | 4 |
| May | 2169 | 948 | 1559 | 672.6 | 0 |
| Jun | 2577 | 1456 | 1967 | 692.7 | 0 |
| Jul | 2882 | 1560 | 2271 | 702.7 | 0 |
| Aug | 2781 | 1559 | 2170 | 642.5 | 0 |
| Sep | 2170 | 1050 | 1560 | 612.4 | 0 |
| Oct | 1458 | 540 | 949 | 441.7 | 3 |
| Nov | 846 | 134 | 440 | 381.5 | 12 |
| Dec | 235 | −425 | −130 | 381.5 | 26 |
| Year | 2882 | −622 | 1049 | 59023 | 115 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 92% | 81% | 0.9 | 8:38 |
| Feb | 88% | 78% | 1.7 | 10:04 |
| Mar | 80% | 69% | 2.8 | 11:44 |
| Apr | 73% | 61% | 4.3 | 13:39 |
| May | 71% | 66% | 5.1 | 15:17 |
| Jun | 66% | 67% | 5.5 | 16:12 |
| Jul | 62% | 64% | 5.3 | 15:50 |
| Aug | 62% | 59% | 4.7 | 14:23 |
| Sep | 70% | 62% | 3.4 | 12:31 |
| Oct | 81% | 70% | 2.0 | 10:40 |
| Nov | 89% | 80% | 1.0 | 9:02 |
| Dec | 92% | 82% | 0.7 | 8:13 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Brno is like
The warmest month is July, with an average high of 28 °C82 °F and a low of 15 °C60 °F. The coldest is January, when highs average 1 °C34 °F and lows −6 °C22 °F. Seasons are strongly marked: the warmest month is on average 24 °C43.2 °F warmer than the coldest.
Annual precipitation is moderate at about 590 mm23 in. The wettest three-month stretch is May–July, which brings 35% of the annual total. The wettest month is July (70 mm2.7 in), the driest is February (33 mm1.3 in).
Relative humidity ranges from 62% in July to 92% in December. The clearest skies (lowest average cloud amount, 59%) are typical of August. Average wind speed near the ground ranges from 8 km/h (5 mph) in August to 12 km/h (7 mph) in February. Daylight lasts from about 8.2 hours in December to 16.2 hours in June.
A lasting snow cover is typical in December–February, when the average snow depth in the reanalysis exceeds 10 cm (deepest in January, about 17 cm).
Best time to visit Brno
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–September: average highs of 21 °C69 °F to 28 °C82 °F with 61 mm2.4 in to 70 mm2.7 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 1 °C34 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Brno
- Winter (December–February) — highs 134 to 4 °C38 °F, lows −622 to −4 °C25 °F, about 36 mm1.4 in of precipitation a month. Pack a winter coat, hat, gloves and warm, non-slip boots and shoes with good grip, as frost is common.
- Spring (March–May) — highs 948 to 21 °C69 °F, lows −130 to 9 °C48 °F, about 45 mm1.8 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 2577 to 28 °C82 °F, lows 1456 to 15 °C60 °F, about 68 mm2.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 846 to 21 °C70 °F, lows 134 to 10 °C50 °F, about 48 mm1.9 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Brno compares
Compared with Vienna, about 111 km to the south, Brno is on average 1.3 °C2.3 °F cooler and receives 20% less precipitation (590 mm23 in vs 737 mm29 in). The difference is largest in January (2.1 °C3.8 °F cooler).
Of the 5 places in Czechia covered by World Climates, Brno is the 2nd warmest by annual mean temperature and the 5th wettest by annual precipitation. See all of them on the Czechia climate page.
Places in other countries with the most similar temperature and rainfall pattern: Opole (Poland, Dfb), Wrocław (Poland, Dfb) and Košice (Slovakia, Dfb).
Nearby places
- Vienna 111 km · 11 °C52 °F · 737 mm29 in
- Bratislava 122 km · 11 °C52 °F · 636 mm25 in
- Ostrava 140 km · 9 °C49 °F · 704 mm28 in
- Žilina 155 km · 9 °C48 °F · 840 mm33 in
- Rybnik 172 km · 9 °C48 °F · 796 mm31 in
- Wałbrzych 177 km · 7 °C45 °F · 683 mm27 in
- Győr 184 km · 11 °C52 °F · 594 mm23 in
- Prague 186 km · 10 °C50 °F · 639 mm25 in
Frequently asked questions
What is the warmest month in Brno?
July is the warmest month in Brno, with an average high of 28 °C (82 °F) and an average low of 15 °C (60 °F).
What is the coldest month in Brno?
January is the coldest month, with an average high of 1 °C (34 °F) and an average low of -6 °C (22 °F).
When does it rain the most in Brno?
July is the wettest month with about 70 mm (2.7 in) of precipitation; February is the driest with about 33 mm (1.3 in).
What is the best time to visit Brno?
Judging by long-term averages, the most comfortable months are May–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.