Seine-et-Marne (Chessy)
September
Weather in Seine-et-Marne for September 2025
Your guide to Seine-et-Marne weather in September - trends and predictions
In general, the average temperature in Seine-et-Marne at the beginning of September is 26.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.4 °C by the end of September.
Seine-et-Marne sees moderate rainfall in September, averaging 7 rainy days.
Is September a good time to visit Seine-et-Marne? check out the best time to travel to Seine-et-Marne page.
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23
Dry days
7
Rainy days
0
Snow days
25°/15°
Temperatures
17 km/h
Avg max wind
62 %
Avg humidity
Seine-et-Marne in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  30° | 2  24° | 3 23° | 4 25° | 5 25° | 6 28° | 7 30° |
| 8 27° | 9 25° | 10 26° | 11  22° | 12  18° | 13 20° | 14  21° |
| 15 24° | 16 23° | 17 25° | 18 24° | 19 23° | 20 24° | 21 21° |
| 22 19° | 23 19° | 24 18° | 25 19° | 26 21° | 27 21° | 28 19° |
| 29 19° | 30 19° |
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Temperatures trend during September in Seine-et-Marne
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. | Sunny | 30° /19° | 1.4 mm | 8 | |
| 2 Sept. | Patchy rain possible | 24° /18° | 0.2 mm | 5 | |
| 3 Sept. | Patchy rain possible | 23° /17° | 0 mm | 5 | |
| 4 Sept. | Sunny | 25° /14° | 0.1 mm | 6 | |
| 5 Sept. | Sunny | 25° /14° | 4.8 mm | 6 | |
| 6 Sept. | Sunny | 28° /16° | 0.4 mm | 7 | |
| 7 Sept. | Sunny | 30° /16° | 3.7 mm | 7 | |
| 8 Sept. | Sunny | 27° /16° | 7.6 mm | 7 | |
| 9 Sept. | Sunny | 25° /17° | 2.9 mm | 6 | |
| 10 Sept. | Sunny | 26° /15° | 0 mm | 6 | |
| 11 Sept. | Partly cloudy | 22° /13° | 2.2 mm | 6 | |
| 12 Sept. | Mist | 18° /11° | 0.2 mm | 5 | |
| 13 Sept. | Fog | 20° /10° | 0.1 mm | 5 | |
| 14 Sept. | Overcast | 21° /13° | 0 mm | 6 | |
| 15 Sept. | Partly cloudy | 24° /11° | 0 mm | 7 | |
| 16 Sept. | Partly cloudy | 23° /13° | 0.4 mm | 6 | |
| 17 Sept. | Mist | 25° /13° | 0.3 mm | 6 | |
| 18 Sept. | Partly cloudy | 24° /15° | 0.2 mm | 6 | |
| 19 Sept. | Overcast | 23° /13° | 0 mm | 6 | |
| 20 Sept. | Overcast | 24° /13° | 0.7 mm | 5 | |
| 21 Sept. | Light rain shower | 21° /13° | 7.1 mm | 5 | |
| 22 Sept. | Light rain shower | 19° /12° | 3.1 mm | 4 | |
| 23 Sept. | Patchy rain possible | 19° /10° | 3 mm | 5 | |
| 24 Sept. | Sunny | 18° /11° | 5.2 mm | 5 | |
| 25 Sept. | Partly cloudy | 19° /11° | 11.2 mm | 5 | |
| 26 Sept. | Sunny | 21° /13° | 6.4 mm | 5 | |
| 27 Sept. | Partly cloudy | 21° /11° | 1.5 mm | 6 | |
| 28 Sept. | Partly cloudy | 19° /10° | 0.1 mm | 5 | |
| 29 Sept. | Patchy rain possible | 19° /9° | 0.1 mm | 4 | |
| 30 Sept. | Sunny | 19° /10° | 0.3 mm | 5 | |
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Important Notice
Our weather forecast for Seine-et-Marne 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 Seine-et-Marne forecast closer to your planned date for the most up-to-date weather information.
Seine-et-Marne in September - FAQ
What are the expected maximum and minimum temperatures in Seine-et-Marne during September?
During September, expect a variety of temperatures with highs around 25° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Seine-et-Marne during September?
Expect minimal rainfall in Seine-et-Marne during September, with a total of 18.7 mm over approximately 7 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Seine-et-Marne during September?
The average wind speed in Seine-et-Marne during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Seine-et-Marne in September?
As you prepare for your trip to Seine-et-Marne 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 Seine-et-Marne, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
- Rain Gear: Lightweight, waterproof clothing
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Seine-et-Marne
Explore the daily rainfall trends and prepare for Seine-et-Marnes September weather 💧
UV exposure in Seine-et-Marne during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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