Weather in Annecy for September 2025
Until now, September 2025 in Annecy is cooler than usual, with temperatures averaging 20.7 °C, this is -2.4 °C below the typical seasonal average.
Expect cooler weather in the next days in Annecy with the forecast suggesting a temperature of 20.9 °C, lower than the historical average.
In general, the average temperature in Annecy at the beginning of September is 25.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.6 °C by the end of September.
Annecy in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 136.2 mm.
Is September a good time to visit Annecy? check out the best time to travel to Annecy page.
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Annecy Weather September
Temperatures trend during September in Annecy
September weather in Annecy day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 24° /9° | 23.1 mm | 6 | |
| 2 Sept. | Sunny | 24° /10° | 2.4 mm | 6 | |
| 3 Sept. | Sunny | 26° /11° | 5.7 mm | 6 | |
| 4 Sept. |  Cloudy | 25° /11° | 11.3 mm | 5 | |
| 5 Sept. |  Light rain shower | 23° /10° | 2.4 mm | 5 | |
| 6 Sept. | Sunny | 26° /9° | 0 mm | 6 | |
| 7 Sept. | Sunny | 28° /11° | 0.3 mm | 7 | |
| 8 Sept. | Sunny | 25° /12° | 7.6 mm | 6 | |
| 9 Sept. | Sunny | 20° /11° | 4.7 mm | 5 | |
| 10 Sept. | Sunny | 24° /10° | 1.2 mm | 6 | |
| 11 Sept. | Sunny | 22° /9° | 5.4 mm | 5 | |
| 12 Sept. | Patchy rain possible | 20° /6° | 1.6 mm | 5 | |
| 13 Sept. |  Moderate or heavy rain shower | 17° /6° | 9.7 mm | 4 | |
| 14 Sept. |  Mist | 19° /7° | 1.7 mm | 4 | |
| 15 Sept. | Mist | 21° /6° | 0 mm | 6 | |
| 16 Sept. | Patchy rain possible | 19° /8° | 0.4 mm | 0.9 | |
| 17 Sept. | Sunny | 22° /6° | 0 mm | 1.4 | |
| 18 Sept. | Sunny | 26° /9° | 0 mm | 1.4 | |
| 19 Sept. | Sunny | 28° /12° | 0 mm | 1.4 | |
| 20 Sept. | Sunny | 28° /13° | 0 mm | 5 | |
| 21 Sept. | Sunny | 24° /15° | 0 mm | 5 | |
| 22 Sept. |  Moderate rain | 17° /14° | 10.9 mm | 4 | |
| 23 Sept. | Patchy rain possible | 19° /10° | 1.8 mm | 3 | |
| 24 Sept. | Patchy rain possible | 15° /8° | 1.3 mm | 3 | |
| 25 Sept. |  Partly cloudy | 16° /4° | 0 mm | 3 | |
| 26 Sept. | Sunny | 17° /3° | 0 mm | 3 | |
| 27 Sept. | Sunny | 20° /5° | 0 mm | 4 | |
| 28 Sept. | Patchy rain possible | 22° /8° | 0.2 mm | 3 | |
| 29 Sept. | Patchy rain possible | 20° /10° | 1.9 mm | 3 | |
| 30 Sept. | Mist | 20° /8° | 2.9 mm | 5 | |
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Annecy weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Sunny | Patchy rain possible | Patchy rain possible |
| Temperatures | 27°/13° | 21°/8° | 17°/7° |
| Rainfall | 132 mm | 136 mm | 178 mm |
| Wind | 7.4 km/h | 7.2 km/h | 6.6 km/h |
| Humidity | 69% | 77% | 82% |
| Rainy days | 18 days | 19 days | 21 days |
| Dry days | 13 days | 11 days | 10 days |
Planning a trip to Annecy? Discover the best time to visit
Annecy in September - FAQ
What to pack to Annecy in September?
As you prepare for your trip to Annecy 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 Annecy, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- 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 Annecy
UV exposure in Annecy during September
Quick links
Where is Annecy?Get accurate weather forecasts for Annecy, located at latitude 45.909 and longitude 6.126. Stay updated with localized weather information tailored for Annecy.