Greater Poland (Poznań)
September
Weather in Greater Poland for September 2026
Your guide to Greater Poland weather in September - trends and predictions
In general, the average temperature in Greater Poland at the beginning of September is 26 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19 °C by the end of September.
The climate of Greater Poland in September is notably wet, with an average of 11 rainy days, and a total of 28.4 mm of precipitation.
Temperatures
Rain 🌧️
19
Dry days
11
Rainy days
0
Snow days
22°/13°
Temperatures
20 km/h
Avg max wind
59 %
Avg humidity
Greater Poland Weather September
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Temperatures trend during September in Greater Poland
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September weather in Greater Poland day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 24° /13° | 2.4 mm | 5 | |
| 2 Sept. | Overcast | 25° /14° | 0 mm | 5 | |
| 3 Sept. | Overcast | 27° /16° | 0 mm | 7 | |
| 4 Sept. |  Sunny | 27° /15° | 0 mm | 7 | |
| 5 Sept. | Sunny | 28° /17° | 0 mm | 7 | |
| 6 Sept. | Sunny | 24° /15° | 2.7 mm | 6 | |
| 7 Sept. | Sunny | 27° /14° | 0 mm | 7 | |
| 8 Sept. | Sunny | 28° /16° | 2.7 mm | 6 | |
| 9 Sept. |  Partly cloudy | 27° /15° | 0.2 mm | 7 | |
| 10 Sept. | Sunny | 25° /15° | 0.5 mm | 6 | |
| 11 Sept. | Sunny | 22° /14° | 4.8 mm | 5 | |
| 12 Sept. | Partly cloudy | 22° /14° | 1.3 mm | 5 | |
| 13 Sept. |  Thundery outbreaks possible | 20° /11° | 5.8 mm | 5 | |
| 14 Sept. | Partly cloudy | 18° /11° | 1.8 mm | 5 | |
| 15 Sept. | Sunny | 20° /12° | 1.1 mm | 5 | |
| 16 Sept. | Sunny | 23° /12° | 1.2 mm | 5 | |
| 17 Sept. | Overcast | 23° /13° | 0.2 mm | 6 | |
| 18 Sept. | Sunny | 24° /13° | 0 mm | 6 | |
| 19 Sept. |  Cloudy | 24° /15° | 0.1 mm | 5 | |
| 20 Sept. | Cloudy | 25° /13° | 0 mm | 6 | |
| 21 Sept. | Partly cloudy | 26° /14° | 0 mm | 6 | |
| 22 Sept. |  Light rain | 21° /12° | 0.5 mm | 5 | |
| 23 Sept. | Partly cloudy | 19° /11° | 1.1 mm | 5 | |
| 24 Sept. | Partly cloudy | 19° /9° | 1.1 mm | 5 | |
| 25 Sept. | Overcast | 19° /9° | 0.3 mm | 5 | |
| 26 Sept. | Sunny | 20° /11° | 0 mm | 5 | |
| 27 Sept. | Overcast | 22° /12° | 0 mm | 5 | |
| 28 Sept. | Partly cloudy | 20° /9° | 0.1 mm | 5 | |
| 29 Sept. |  Patchy rain possible | 18° /10° | 0.1 mm | 4 | |
| 30 Sept. | Patchy rain possible | 15° /9° | 0.4 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Greater Poland 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 Greater Poland forecast closer to your planned date for the most up-to-date weather information.
Change Month
Greater Poland in September - FAQ
What are the expected maximum and minimum temperatures in Greater Poland during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Greater Poland during September?
In September, Greater Poland can expect light to moderate rainfall, totaling 28.4 mm across approximately 11 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Greater Poland during September?
The average wind speed in Greater Poland during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Greater Poland
Explore the daily rainfall trends and prepare for Greater Polands September weather 💧
Typically, Greater Poland has 11 rainy days in September with a total of 28.4 mm of rainfall.
UV exposure in Greater Poland during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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