Greater Poland (Poznań)
September
Weather in Greater Poland for September 2025
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 26.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21 °C by the end of September.
Greater Poland experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 22.4 mm.
Is September a good time to visit Greater Poland? check out the best time to travel to Greater Poland page.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
23°/14°
Temperatures
20 km/h
Avg max wind
56 %
Avg humidity
Greater Poland in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2 25° | 3 28° | 4  26° | 5  28° | 6 28° | 7 29° |
| 8 30° | 9  27° | 10 25° | 11 24° | 12 22° | 13  18° | 14 19° |
| 15 19° | 16 25° | 17 26° | 18 27° | 19 23° | 20 23° | 21 25° |
| 22  23° | 23 20° | 24 21° | 25 21° | 26 22° | 27 24° | 28 22° |
| 29 20° | 30  17° |
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Temperatures trend during September in Greater Poland
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 23° /11° | 3.5 mm | 5 | |
| 2 Sept. | Overcast | 25° /13° | 0 mm | 6 | |
| 3 Sept. | Overcast | 28° /16° | 0 mm | 7 | |
| 4 Sept. | Cloudy | 26° /15° | 0 mm | 7 | |
| 5 Sept. | Sunny | 28° /17° | 0 mm | 8 | |
| 6 Sept. | Sunny | 28° /16° | 0 mm | 8 | |
| 7 Sept. | Sunny | 29° /16° | 0 mm | 8 | |
| 8 Sept. | Sunny | 30° /18° | 0.2 mm | 7 | |
| 9 Sept. | Partly cloudy | 27° /16° | 0.3 mm | 7 | |
| 10 Sept. | Sunny | 25° /15° | 0.6 mm | 6 | |
| 11 Sept. | Sunny | 24° /14° | 0 mm | 6 | |
| 12 Sept. | Partly cloudy | 22° /14° | 1.4 mm | 5 | |
| 13 Sept. | Thundery outbreaks possible | 18° /11° | 8.4 mm | 5 | |
| 14 Sept. | Partly cloudy | 19° /11° | 0.4 mm | 5 | |
| 15 Sept. | Sunny | 19° /12° | 0.8 mm | 5 | |
| 16 Sept. | Sunny | 25° /13° | 1.7 mm | 6 | |
| 17 Sept. | Overcast | 26° /14° | 0 mm | 7 | |
| 18 Sept. | Sunny | 27° /15° | 0 mm | 7 | |
| 19 Sept. | Cloudy | 23° /14° | 0.2 mm | 5 | |
| 20 Sept. | Cloudy | 23° /12° | 0 mm | 6 | |
| 21 Sept. | Partly cloudy | 25° /13° | 0 mm | 7 | |
| 22 Sept. | Light rain | 23° /13° | 0.5 mm | 6 | |
| 23 Sept. | Partly cloudy | 20° /12° | 1.7 mm | 6 | |
| 24 Sept. | Partly cloudy | 21° /11° | 1.6 mm | 5 | |
| 25 Sept. | Overcast | 21° /11° | 0.5 mm | 5 | |
| 26 Sept. | Sunny | 22° /13° | 0 mm | 6 | |
| 27 Sept. | Overcast | 24° /15° | 0.1 mm | 6 | |
| 28 Sept. | Partly cloudy | 22° /11° | 0.2 mm | 6 | |
| 29 Sept. | Partly cloudy | 20° /10° | 0 mm | 5 | |
| 30 Sept. | Patchy rain possible | 17° /10° | 0.3 mm | 5 | |
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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.
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 23° and cooler nights around 14°. 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 22.4 mm across approximately 6 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.
What to pack to Greater Poland in September?
As you prepare for your trip to Greater Poland 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 Greater Poland, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- 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
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Greater Poland
Explore the daily rainfall trends and prepare for Greater Polands September weather 💧
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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