Brno, Czechia climate

Cfb Oceanic / temperate

Brno has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 26°C, while the coldest is January averaging around −6°C at night. Around 565 mm of precipitation falls each year, peaking in June (64 mm) and easing off in April (27 mm).

☀️ Summers

Warm

Highs near 26°C in July.

About 4 days a year above 32 °C

❄️ Winters

Cold

Lows near −6°C in January.

About 58 freezing nights a year

🌧️ Rain

Moderate rainfall

About 565 mm of rain a year.

Wettest in June

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

+0.2 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Brno climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	1	4	10	16	20	24	26	26	20	14	7	1
Avg temp (°C)	−3	0	5	11	15	18	20	20	15	9	4	−2
Avg low (°C)	−6	−5	0	5	9	12	14	14	10	4	0	−5
Precipitation (mm)	59	48	34	27	58	64	61	58	51	34	34	37

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	1	4	10	16	20	24
Avg temp (°C)	−3	0	5	11	15	18
Avg low (°C)	−6	−5	0	5	9	12
Precipitation (mm)	59	48	34	27	58	64

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	26	26	20	14	7	1
Avg temp (°C)	20	20	15	9	4	−2
Avg low (°C)	14	14	10	4	0	−5
Precipitation (mm)	61	58	51	34	34	37

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	11	9	9	7	11	9	10	8	8	9	10	11
Days with high ≥ 32°C (days)	—	—	—	—	—	0.6	2	2	—	—	—	—
Days with low ≤ 0°C (days)	13	12	10	3	0.2	—	—	—	—	3	6	12

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	11	9	9	7	11	9
Days with high ≥ 32°C (days)	—	—	—	—	—	0.6
Days with low ≤ 0°C (days)	13	12	10	3	0.2	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	8	8	9	10	11
Days with high ≥ 32°C (days)	2	2	—	—	—	—
Days with low ≤ 0°C (days)	—	—	—	3	6	12

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	75	74	70	65	67	69	65	61	65	72	77	76
Clear days (≤ 30% cloud)	3	3	4	5	4	3	5	5	6	3	2	2
Partly cloudy days (30–70%)	7	7	8	9	9	10	10	12	9	8	7	7
Cloudy days (≥ 70%)	22	19	19	16	17	17	16	14	16	19	21	22
Relative humidity (%)	92	88	81	74	70	66	62	62	70	80	89	93
Wind speed (km/h)	10.8	11.3	11.1	10.1	9.7	8.9	8.8	8.1	9.1	9.5	10.1	10.2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	75	74	70	65	67	69
Clear days (≤ 30% cloud)	3	3	4	5	4	3
Partly cloudy days (30–70%)	7	7	8	9	9	10
Cloudy days (≥ 70%)	22	19	19	16	17	17
Relative humidity (%)	92	88	81	74	70	66
Wind speed (km/h)	10.8	11.3	11.1	10.1	9.7	8.9

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	65	61	65	72	77	76
Clear days (≤ 30% cloud)	5	5	6	3	2	2
Partly cloudy days (30–70%)	10	12	9	8	7	7
Cloudy days (≥ 70%)	16	14	16	19	21	22
Relative humidity (%)	62	62	70	80	89	93
Wind speed (km/h)	8.8	8.1	9.1	9.5	10.1	10.2

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 22 years of daily observations at Turany, a weather station, about 8 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →