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Weather in Białystok for September 2025

Your guide to Białystok weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Białystok has been nearly identical to the historical average, with a temperature of 25.8 °C (showing only a slight deviation of -0.3 °C).

  • The forecast for the next days in Białystok predicts a temperature of 19.4 °C, which is cooler than the historical average.

  • In general, the average temperature in Białystok at the beginning of September is 28.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.3 °C by the end of September.

    • Rain 🌧️

  • Białystok experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 30.5 mm.

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/13°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
52 %
Avg humidity

Białystok Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Partly cloudy
26°
2
Heavy rain at times
29°
3
Sunny
30°
4
Patchy rain possible
30°
5
Partly cloudy
30°
6
Partly cloudy
28°
7
Sunny
27°
8
Partly cloudy
27°
9
Overcast
25°
10
Moderate rain at times
23°
11
Overcast
22°
12
Cloudy
21°
13
Moderate rain at times
22°
14
Heavy rain at times
24°
15
Patchy rain possible
18°
16
Moderate rain
18°
17
Patchy rain possible
17°
18
Partly cloudy
19°
19
Patchy rain possible
22°
20
Sunny
26°
21
Partly cloudy
25°
22
Sunny
16°
23
Sunny
18°
24
Partly cloudy
22°
25
Partly cloudy
17°
26
Sunny
16°
27
Sunny
18°
28
Patchy rain possible
19°
29
Overcast
14°
30
Partly cloudy
15°

Temperatures trend during September in Białystok

See the weather trend as well as the moving average line

September weather in Białystok day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 26° /12° 0.4 mm 7
2 Sept. Heavy rain at times
Heavy rain at times
 29° /14° 1.3 mm 7
3 Sept. Sunny
Sunny
 30° /16° 1.4 mm 7
4 Sept. Patchy rain possible
Patchy rain possible
 30° /15° 0.3 mm 7
5 Sept. Partly cloudy
Partly cloudy
 30° /16° 1.2 mm 7
6 Sept. Partly cloudy
Partly cloudy
 28° /15° 0.6 mm 7
7 Sept. Sunny
Sunny
 27° /14° 2.5 mm 6
8 Sept. Partly cloudy
Partly cloudy
 27° /13° 0 mm 7
9 Sept. Overcast
Overcast
 25° /14° 0.6 mm 6
10 Sept. Moderate rain at times
Moderate rain at times
 23° /14° 1.9 mm 5
11 Sept. Overcast
Overcast
 22° /13° 8.6 mm 5
12 Sept. Cloudy
Cloudy
 21° /12° 1.6 mm 5
13 Sept. Moderate rain at times
Moderate rain at times
 22° /11° 1.3 mm 6
14 Sept. Heavy rain at times
Heavy rain at times
 24° /15° 2.3 mm 5
15 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 1.3 mm 0.7
16 Sept. Moderate rain
Moderate rain
 18° /11° 5.9 mm 0.7
17 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 1.8 mm 0.5
18 Sept. Partly cloudy
Partly cloudy
 19° /9° 0.1 mm 0.8
19 Sept. Patchy rain possible
Patchy rain possible
 22° /12° 0.1 mm 1.1
20 Sept. Sunny
Sunny
 26° /14° 0 mm 5
21 Sept. Partly cloudy
Partly cloudy
 25° /12° 0.1 mm 5
22 Sept. Sunny
Sunny
 16° /8° 0 mm 4
23 Sept. Sunny
Sunny
 18° /6° 0 mm 4
24 Sept. Partly cloudy
Partly cloudy
 22° /10° 0.1 mm 5
25 Sept. Partly cloudy
Partly cloudy
 17° /7° 0 mm 4
26 Sept. Sunny
Sunny
 16° /6° 0 mm 4
27 Sept. Sunny
Sunny
 18° /5° 0 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 19° /10° 0.1 mm 3
29 Sept. Overcast
Overcast
 14° /7° 0 mm 3
30 Sept. Partly cloudy
Partly cloudy
 15° /4° 0 mm 5
Next
Important Notice
Our weather forecast for Białystok 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 Białystok forecast closer to your planned date for the most up-to-date weather information.
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Białystok in September - FAQ

What are the expected maximum and minimum temperatures in Białystok during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Białystok during September?
In September, Białystok can expect light to moderate rainfall, totaling 30.5 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Białystok during September?
The average wind speed in Białystok during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Białystok

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

UV exposure in Białystok during September

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

Quick links

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Location coordinates Where is Białystok?

Get accurate weather forecasts for Białystok, located at latitude 53.133 and longitude 23.164. Stay updated with localized weather information tailored for Białystok.

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