Ille-et-Vilaine (Rennes)
September
Weather in Ille-et-Vilaine for September 2027
Your guide to Ille-et-Vilaine weather in September - trends and predictions
In general, the average temperature in Ille-et-Vilaine at the beginning of September is 25.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.8 °C by the end of September.
The climate of Ille-et-Vilaine in September is notably wet, with an average of 11 rainy days, and a total of 57.3 mm of precipitation.
Is September a good time to visit Ille-et-Vilaine? check out the best time to travel to Ille-et-Vilaine page.
✨ Is September a good time to visit Ille-et-Vilaine? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
19
Dry days
11
Rainy days
0
Snow days
23°/12°
Temperatures
21 km/h
Avg max wind
70 %
Avg humidity
Ille-et-Vilaine Weather September
Move between months or click on a day
Temperatures trend during September in Ille-et-Vilaine
See the weather trend as well as the moving average line
September weather in Ille-et-Vilaine day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain | 24° /14° | 4.8 mm | 5 | |
| 2 Sept. |  Patchy rain possible | 24° /13° | 2.4 mm | 5 | |
| 3 Sept. | Light rain shower | 26° /14° | 0.8 mm | 6 | |
| 4 Sept. | Light rain shower | 26° /15° | 0.9 mm | 6 | |
| 5 Sept. |  Partly cloudy | 26° /14° | 0.8 mm | 6 | |
| 6 Sept. | Patchy rain possible | 28° /15° | 1.2 mm | 6 | |
| 7 Sept. | Light rain | 25° /15° | 4.6 mm | 5 | |
| 8 Sept. |  Moderate or heavy rain shower | 23° /14° | 6.9 mm | 5 | |
| 9 Sept. | Patchy rain possible | 23° /13° | 1.8 mm | 5 | |
| 10 Sept. |  Overcast | 23° /13° | 0.4 mm | 5 | |
| 11 Sept. | Partly cloudy | 23° /11° | 0.6 mm | 5 | |
| 12 Sept. | Partly cloudy | 24° /12° | 0.4 mm | 5 | |
| 13 Sept. | Light rain | 24° /13° | 2.6 mm | 5 | |
| 14 Sept. | Patchy rain possible | 25° /13° | 2.2 mm | 5 | |
| 15 Sept. | Patchy rain possible | 23° /12° | 0.2 mm | 5 | |
| 16 Sept. | Patchy rain possible | 22° /12° | 0.3 mm | 5 | |
| 17 Sept. | Partly cloudy | 23° /11° | 0.6 mm | 5 | |
| 18 Sept. | Patchy rain possible | 23° /11° | 1.2 mm | 4.9 | |
| 19 Sept. | Partly cloudy | 24° /12° | 0.4 mm | 4.8 | |
| 20 Sept. | Patchy rain possible | 23° /11° | 1.3 mm | 4.7 | |
| 21 Sept. | Light rain | 20° /11° | 3.9 mm | 4.7 | |
| 22 Sept. | Light rain shower | 21° /10° | 2.2 mm | 4.6 | |
| 23 Sept. | Patchy rain possible | 20° /10° | 2.3 mm | 4 | |
| 24 Sept. | Patchy rain possible | 21° /11° | 1 mm | 4 | |
| 25 Sept. | Light rain | 21° /11° | 4 mm | 4 | |
| 26 Sept. | Patchy rain possible | 20° /11° | 1.5 mm | 4 | |
| 27 Sept. | Patchy rain possible | 20° /11° | 1.5 mm | 4 | |
| 28 Sept. | Light rain | 18° /10° | 5.1 mm | 4 | |
| 29 Sept. | Overcast | 20° /10° | 0.9 mm | 4 | |
| 30 Sept. | Patchy rain possible | 20° /10° | 0.7 mm | 3.9 | |
| Next | |||||
Important Notice
Our weather forecast for Ille-et-Vilaine 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 Ille-et-Vilaine forecast closer to your planned date for the most up-to-date weather information.
Change Month
Ille-et-Vilaine weather in September vs August vs October
Compare September weather in Ille-et-Vilaine 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 | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 26°/13° | 23°/12° | 18°/10° |
| Rainfall | 44 mm | 57 mm | 81 mm |
| Wind | 20.8 km/h | 20.6 km/h | 22 km/h |
| Humidity | 65% | 70% | 76% |
| Rainy days | 7 days | 11 days | 13 days |
| Dry days | 24 days | 19 days | 18 days |
Planning a trip to Ille-et-Vilaine? Discover the best time to visit
Ille-et-Vilaine in September - FAQ
What are the expected maximum and minimum temperatures in Ille-et-Vilaine during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Ille-et-Vilaine during September?
Moderate rainfall is anticipated in Ille-et-Vilaine during September, with a total of 57.3 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Ille-et-Vilaine during September?
The average wind speed in Ille-et-Vilaine during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Ille-et-Vilaine
Explore the daily rainfall trends and prepare for Ille-et-Vilaines September weather 💧
Typically, Ille-et-Vilaine has 11 rainy days in September with a total of 57.3 mm of rainfall.
UV exposure in Ille-et-Vilaine during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
What to pack to Ille-et-Vilaine in September?
Mild & changeable · highs around 23 °C, frequent showers
As you prepare for your trip to Ille-et-Vilaine 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 Ille-et-Vilaine, during September, is comfortable and enjoyable, regardless of the weather conditions.
0%0 / 6
🧥 Clothing
👟 Footwear
🎒 Accessories
Top locations in Ille-et-Vilaine
Select a location for an accurate weather forecast
More Locations Quick links
More Ille-et-Vilaine weather pages
You are here
Found a mistake?
We appreciate your attention to details. Tell us here.