Seine-et-Marne (Chessy)
September
Weather in Seine-et-Marne for September 2026
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 25.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.4 °C by the end of September.
Seine-et-Marne in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 59 mm.
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Temperatures
Rain 🌧️
More
14
Dry days
16
Rainy days
0
Snow days
22°/13°
Temperatures
19 km/h
Avg max wind
66 %
Avg humidity
Seine-et-Marne Weather September
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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 in Seine-et-Marne day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 27° /16° | 1.8 mm | 7 | |
| 2 Sept. |  Patchy rain possible | 23° /15° | 0.5 mm | 5 | |
| 3 Sept. | Patchy rain possible | 23° /16° | 0.8 mm | 5 | |
| 4 Sept. | Sunny | 24° /14° | 1.1 mm | 6 | |
| 5 Sept. | Sunny | 25° /14° | 3.2 mm | 6 | |
| 6 Sept. | Sunny | 27° /15° | 0.3 mm | 7 | |
| 7 Sept. | Sunny | 30° /16° | 2.5 mm | 7 | |
| 8 Sept. | Sunny | 27° /16° | 5.1 mm | 6 | |
| 9 Sept. | Sunny | 25° /16° | 1.9 mm | 6 | |
| 10 Sept. | Sunny | 25° /15° | 0.2 mm | 6 | |
| 11 Sept. | Light rain shower | 21° /13° | 2.1 mm | 5 | |
| 12 Sept. |  Mist | 19° /11° | 0.1 mm | 5 | |
| 13 Sept. | Fog | 20° /11° | 1.9 mm | 5 | |
| 14 Sept. |  Overcast | 21° /12° | 0.5 mm | 5 | |
| 15 Sept. |  Partly cloudy | 24° /12° | 0.2 mm | 6 | |
| 16 Sept. | Partly cloudy | 22° /12° | 0.3 mm | 5 | |
| 17 Sept. | Overcast | 25° /13° | 0.2 mm | 6 | |
| 18 Sept. | Partly cloudy | 25° /15° | 0.2 mm | 6 | |
| 19 Sept. | Partly cloudy | 26° /14° | 0 mm | 6 | |
| 20 Sept. | Overcast | 25° /15° | 2.4 mm | 5 | |
| 21 Sept. | Light rain shower | 20° /12° | 5.6 mm | 4 | |
| 22 Sept. | Light rain shower | 18° /11° | 2.5 mm | 4 | |
| 23 Sept. | Patchy rain possible | 17° /10° | 6.3 mm | 4 | |
| 24 Sept. | Sunny | 16° /10° | 6.2 mm | 4 | |
| 25 Sept. | Partly cloudy | 17° /10° | 7.5 mm | 4 | |
| 26 Sept. | Sunny | 18° /11° | 4.3 mm | 4 | |
| 27 Sept. | Partly cloudy | 20° /11° | 1 mm | 5 | |
| 28 Sept. | Partly cloudy | 19° /9° | 0.1 mm | 4 | |
| 29 Sept. | Patchy rain possible | 20° /9° | 0.1 mm | 5 | |
| 30 Sept. | Sunny | 19° /10° | 0.2 mm | 5 | |
| Next | |||||
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.
Change Month
Seine-et-Marne weather in September vs August vs October
Compare September weather in Seine-et-Marne with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| August | September | October | |
|---|---|---|---|
| Weather | Sunny | Patchy rain possible | Patchy rain possible |
| Temperatures | 27°/15° | 22°/13° | 17°/10° |
| Rainfall | 29 mm | 59 mm | 81 mm |
| Wind | 16.3 km/h | 19.2 km/h | 19.4 km/h |
| Humidity | 58% | 66% | 71% |
| Rainy days | 9 days | 16 days | 22 days |
| Dry days | 22 days | 14 days | 9 days |
Planning a trip to Seine-et-Marne? Discover the best time to visit
Seine-et-Marne in September - FAQ
What are the expected maximum and minimum temperatures in Seine-et-Marne 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 Seine-et-Marne during September?
Moderate rainfall is anticipated in Seine-et-Marne during September, with a total of 59 mm spread over approximately 16 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Seine-et-Marne during September?
The average wind speed in Seine-et-Marne during September is 19 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
- Warm Clothing: Sweaters, hoodies, long trousers
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- 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 Seine-et-Marne
Explore the daily rainfall trends and prepare for Seine-et-Marnes September weather 💧
Typically, Seine-et-Marne has 16 rainy days in September with a total of 59 mm of rainfall.
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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