Białystok
September
Weather in Białystok for September 2026
Your guide to Białystok weather in September - trends and predictions
Until now, September 2026 in Białystok is cooler than usual, with temperatures averaging 19.4 °C, this is 4.6 °C below the typical seasonal average.
The forecast for the next days in Białystok predicts a temperature of 15 °C, which is cooler than the historical average.
In general, the average temperature in Białystok at the beginning of September is 25.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11.9 °C by the end of September.
The climate of Białystok in September is notably wet, with an average of 13 rainy days, and a total of 42 mm of precipitation.
Temperatures
Rain 🌧️
17
Dry days
13
Rainy days
0
Snow days
23°/12°
Temperatures
19 km/h
Avg max wind
60 %
Avg humidity
Białystok Weather September
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Temperatures trend during September in Białystok
See the weather trend as well as the moving average line
September weather in Białystok day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Partly cloudy | 24° /12° | 1.7 mm | 5 | |
| 2 Sept. |  Heavy rain at times | 27° /14° | 1.1 mm | 6 | |
| 3 Sept. |  Sunny | 27° /14° | 1 mm | 5 | |
| 4 Sept. |  Patchy rain possible | 26° /15° | 2.7 mm | 5 | |
| 5 Sept. | Patchy rain possible | 26° /15° | 1.4 mm | 5 | |
| 6 Sept. | Patchy rain possible | 25° /13° | 1.4 mm | 5 | |
| 7 Sept. | Sunny | 24° /12° | 1.7 mm | 5 | |
| 8 Sept. | Partly cloudy | 26° /12° | 0 mm | 6 | |
| 9 Sept. |  Overcast | 27° /15° | 0.4 mm | 5 | |
| 10 Sept. |  Moderate rain at times | 21° /13° | 4.7 mm | 4 | |
| 11 Sept. | Overcast | 21° /11° | 5.7 mm | 4 | |
| 12 Sept. |  Cloudy | 20° /12° | 1.3 mm | 3 | |
| 13 Sept. | Moderate rain at times | 20° /10° | 0.9 mm | 4 | |
| 14 Sept. | Heavy rain at times | 21° /13° | 6.1 mm | 4 | |
| 15 Sept. | Patchy rain possible | 22° /13° | 5.1 mm | 5 | |
| 16 Sept. | Sunny | 23° /13° | 0 mm | 3.8 | |
| 17 Sept. | Overcast | 17° /13° | 5.2 mm | 4 | |
| 18 Sept. | Overcast | 20° /11° | 0.1 mm | 4 | |
| 19 Sept. | Overcast | 21° /13° | 0 mm | 6 | |
| 20 Sept. | Light rain shower | 19° /12° | 3.4 mm | 4 | |
| 21 Sept. | Light rain shower | 12° /8° | 6 mm | 3 | |
| 22 Sept. | Light rain shower | 12° /8° | 4.3 mm | 3 | |
| 23 Sept. | Patchy rain possible | 11° /7° | 3.8 mm | 3 | |
| 24 Sept. | Light rain shower | 9° /8° | 10.9 mm | 2 | |
| 25 Sept. | Patchy rain possible | 14° /7° | 0.3 mm | 4 | |
| 26 Sept. | Overcast | 13° /8° | 1.9 mm | 3 | |
| 27 Sept. | Overcast | 13° /8° | 16.9 mm | 3 | |
| 28 Sept. | Patchy rain possible | 11° /7° | 13.6 mm | 2 | |
| 29 Sept. | Overcast | 11° /5° | 0.1 mm | 3 | |
| 30 Sept. | Partly cloudy | 12° /5° | 0.5 mm | 4 | |
| 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.
Change Month
Białystok in September - FAQ
What are the expected maximum and minimum temperatures in Białystok during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 12°. 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 42 mm across approximately 13 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 💧
Typically, Białystok has 13 rainy days in September with a total of 42 mm of rainfall.
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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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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