Rennes in september: average Weather, Temperature and Climate
Weather in Rennes in september 2025
The weather in Rennes in the month of september comes from statistical datas on the past years. You can view the weather statistics the entire month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather
Weather at 6am
54°F
Fog
37% of time
25%
22%
10%
Weather at 12pm
70°F
Clear/Sunny
37% of time
30%
20%
10%
Weather at 6pm
65°F
Clear/Sunny
43% of time
29%
14%
13%
Weather at 3am
54°F
32%
29%
18%
11%
Evolution of daily average temperature and precipitation in Rennes in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Rennes in september.
The climate of Rennes in september is good
the weather in Rennes in september is rather dry (with 1.4in of rainfall over 2 days). It should be noted an improvement from the previous month since in august it receives an average of 2.2in of rainfall over 4 days.
The climate quite pleasant here september. The high seasonal norm is 72°F. On average, the recorded minimum temperature is 54°F. Thus, the mean temperature average in september in Rennes is 63°F. Note that these seasonal averages are in contrast with those observed in Rennes in september with a maximum record of 97°F in 2021 and a minimum record of 40°F in 2010. You can plan to have about 27 days with temperatures above 65°F, or 90% of the month.
On this month of september, day length in Rennes is generally 12:35. Sunrise is at 06:44 and sets at 19:19.
With a good weather, september is recommended to go there in Brittany.
Seasonal average climate and temperature of Rennes in september
Check below seasonal norms These datas are generated from the weather statements of the past years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 63°F | ||||
| Highest temperature | 72°F | ||||
| Lowest temperature | 54°F | ||||
| Highest record temperature | 97°F (2021) | ||||
| Lowest record temperature | 40°F (2010) | ||||
| Number of days at +86°F | 1 day(s) (3%) | ||||
| Number of days at +65°F | 27 day(s) (90%) | ||||
| Wind | |||||
| Wind speed | 17km/h | ||||
| Wind temperature | 52°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 1.4in | ||||
| Number of days with rainfall | 2 day(s) (8%) | ||||
| Record daily rainfall | 0.8in (2013) | ||||
| Other climate data | |||||
| Humidity | 93% | ||||
| Visibility | 8.53km | ||||
| Cloud cover | 40% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:44 | ||||
| Time of sunset | 19:19 | ||||
| Length of day | 12:35 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Rennes in september 2024:
65°F to 72°F
59°F to 74°F
56°F to 72°F
52°F to 70°F
54°F to 67°F
54°F to 67°F
54°F to 59°F
58°F to 63°F
59°F to 68°F
49°F to 72°F
54°F to 61°F
49°F to 61°F
45°F to 65°F
43°F to 65°F
45°F to 70°F
50°F to 68°F
52°F to 74°F
56°F to 77°F
58°F to 76°F
56°F to 76°F
56°F to 63°F
56°F to 72°F
52°F to 65°F
56°F to 67°F
58°F to 59°F
59°F to 67°F
52°F to 58°F
47°F to 59°F
47°F to 58°F
59°F to 63°F
Map: other cities in Brittany in september
Cities near Rennes:
| Chateaubourg in september | good weather |
| Janze in september | good weather |
| Hede-Bazouges in september | good weather |
| Montauban-de-Bretagne in september | good weather |
| Bain-de-Bretagne in september | good weather |
| Combourg in september | good weather |
| Vitré in september | good weather |
| Paimpont in september | good weather |
| La Guerche-de-Bretagne in september | good weather |
| Saint-Meen-le-Grand in september | good weather |
| Guer in september | good weather |
| Fougeres in september | good weather |
Click over cities on the map for information about the weather in september.
Rennes
perfect weather
good
tolerable
bad
very bad
Weather data for Rennes in september:
Weather data for Rennes for september are derived from an average of the weather forecast since 2009 in Rennes. There is a margin of error and these forecasts are to be considered as general information only. The weather in Rennes can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Rennes.