September weather forecast and climate
Brno, Czech Republic

Temperature

In September, the average high-temperature is 20.2°C (68.4°F), and the average low-temperature is 9.5°C (49.1°F).

Humidity

In Brno, the average relative humidity is 73%.

Rainfall

In Brno, during 5.5 rainfall days, 37.6mm (1.5") of precipitation is typically accumulated. In Brno, Czech Republic, during the entire year, the rain falls for 79.7 days and collects up to 490.3mm (19.3") of precipitation.

Snowfall

Throughout the year, in Brno, 526mm (20.7") of snow is accumulated.

Daylight

In Brno, the average length of the day is 12.6h.

Sunshine

In September, the average sunshine is 5.4h.

UV index

In Brno, the average UV index in September is 4.

What is the temperature in September in Brno?

In September, in Brno, the average high-temperature is 20.2°C (68.4°F), and the average low-temperature is 9.5°C (49.1°F).

What is the average humidity in September in Brno?

The average relative humidity in September in Brno is 73%.

How many days does it rain in September in Brno?

In Brno, in September, during 5.5 rainfall days, 37.6mm (1.5") of precipitation is typically accumulated.

How many hours of daylight does Brno have in September?

In Brno, Czech Republic, the average length of the day in September is 12.6h.

How long on average sun shines in September in Brno?

In September, the average sunshine in Brno is 5.4h.

What is the UV index intensity in September in Brno?

The average UV index in September in Brno is 4.
Average temperature in September - Brno, Czech Republic
  • Average high temperature in September: 20.2°C

The warmest month (with the highest average high temperature) is July (24.5°C).
The month with the lowest average high temperature is January (0.2°C).

  • Average low temperature in September: 9.5°C

The month with the highest average low temperature is July (12.7°C).
The coldest month (with the lowest average low temperature) is January (-5.2°C).

Average humidity in September - Brno, Czech Republic
  • Average humidity in September: 73%

The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is April (65%).

Average rainfall in September - Brno, Czech Republic
  • Average rainfall in September: 37.6mm

The wettest month (with the highest rainfall) is June (72.2mm).
The driest month (with the lowest rainfall) is February (23.8mm).

Average rainfall days in September - Brno, Czech Republic
  • Average rainfall days in September: 5.5 days

The month with the highest number of rainy days is June (9.1 days).
The month with the lowest number of rainy days is October (5.1 days).

Average snowfall in September - Brno, Czech Republic
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (174mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

Average daylight in September / Average sunshine in September - Brno, Czech Republic
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.2h).
The month with shortest days is December (Average daylight: 8.3h).

  • Average sunshine in September: 5.4h

The month with most sunshine is July (Average sunshine: 7.6h).
The month with least sunshine is December (Average sunshine: 1.3h).

Average UV index in September - Brno, Czech Republic
  • Average UV index in September: 4

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 1).

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