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Weather in Brno for September 2025

Your guide to Brno weather in September - trends and predictions
  • In general, the average temperature in Brno at the beginning of September is 28.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.6 °C by the end of September.

  • With an average of 4 rainy days, Brno experiences minimal rainfall in September.

  • Is September a good time to visit Brno? check out the best time to travel to Brno page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
26
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/14°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
60 %
Avg humidity

Brno in September average weather

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Temperatures trend during September in Brno

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
28° /15° 0.5 mm 7
2 Sept. Cloudy
Cloudy
30° /16° 0.1 mm 7
3 Sept. Thundery outbreaks possible
Thundery outbreaks possible
29° /17° 1.8 mm 7
4 Sept. Partly cloudy
Partly cloudy
28° /16° 0 mm 7
5 Sept. Overcast
Overcast
28° /16° 0 mm 7
6 Sept. Sunny
Sunny
25° /16° 0.4 mm 7
7 Sept. Sunny
Sunny
29° /16° 0 mm 8
8 Sept. Sunny
Sunny
29° /18° 0 mm 8
9 Sept. Sunny
Sunny
27° /14° 3.3 mm 7
10 Sept. Sunny
Sunny
24° /13° 0.2 mm 6
11 Sept. Sunny
Sunny
26° /13° 0 mm 7
12 Sept. Sunny
Sunny
22° /12° 10.7 mm 5
13 Sept. Thundery outbreaks possible
Thundery outbreaks possible
18° /11° 30.2 mm 4
14 Sept. Cloudy
Cloudy
17° /11° 42.2 mm 4
15 Sept. Sunny
Sunny
20° /11° 13.2 mm 5
16 Sept. Partly cloudy
Partly cloudy
21° /11° 4.9 mm 6
17 Sept. Sunny
Sunny
22° /13° 0.5 mm 6
18 Sept. Partly cloudy
Partly cloudy
25° /15° 0 mm 6
19 Sept. Light rain shower
Light rain shower
22° /13° 3.5 mm 6
20 Sept. Partly cloudy
Partly cloudy
23° /13° 0 mm 6
21 Sept. Cloudy
Cloudy
23° /14° 0 mm 6
22 Sept. Light drizzle
Light drizzle
21° /12° 1.6 mm 6
23 Sept. Cloudy
Cloudy
20° /12° 0 mm 5
24 Sept. Overcast
Overcast
18° /12° 0.5 mm 4
25 Sept. Overcast
Overcast
22° /12° 0 mm 5
26 Sept. Sunny
Sunny
23° /14° 0 mm 6
27 Sept. Sunny
Sunny
22° /13° 0.4 mm 6
28 Sept. Sunny
Sunny
21° /11° 0.1 mm 6
29 Sept. Sunny
Sunny
19° /9° 0 mm 6
30 Sept. Patchy light drizzle
Patchy light drizzle
19° /9° 0.3 mm 4
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Important Notice
Our weather forecast for Brno in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Brno forecast closer to your planned date for the most up-to-date weather information.

Guide for Brno in September

In Brno, Czechia, September marks the transition from summer to autumn, bringing about noticeable changes in the weather. At the beginning of the month, Brno experiences mild and pleasant temperatures, with average highs around 20° and lows around 10°.

The weather is generally comfortable for outdoor activities, with a mix of sunny and partly cloudy days. However, occasional rainfall can be expected, so it's advisable for travelers to pack an umbrella or light rain jacket.

As the month progresses towards the end of September, Brno begins to witness a gradual drop in temperatures. The average highs decrease to around 16° and lows to around 7°. The weather becomes cooler, and there is a higher chance of rainfall.

Visitors can expect more overcast days and a noticeable change in the foliage as the autumn colors start to emerge.

Overall, September in Brno offers a pleasant transition from summer to autumn, with comfortable temperatures at the beginning of the month and a gradual shift towards cooler weather by the end.

It's a great time to explore the city's charming streets and parks while enjoying the changing seasonal scenery.

Brno in September - FAQ

Is September a good time to visit Brno?
Yes, September is a good time to traveling to Brno, read more about the best time to visit Brno.
What are the expected maximum and minimum temperatures in Brno during September?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Brno during September?
Expect minimal rainfall in Brno during September, with a total of 14.4 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Brno during September?
The average wind speed in Brno during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Brno in September?

As you prepare for your trip to Brno in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Brno, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather

September rainfall patterns in Brno

Explore the daily rainfall trends and prepare for Brnos September weather 💧

UV exposure in Brno during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Brno?

Get accurate weather forecasts for Brno, located at latitude 49.195 and longitude 16.608. Stay updated with localized weather information tailored for Brno.

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