Click on a day for an hourly weather forecast
The temperatures in Rennes in October are quite cold with temperatures between 9°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Rennes during the month of October. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Rennes in October 2025.
If you’re planning to visit Rennes in the near future, we highly recommend that you review the 14 day weather forecast for Rennes before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 3° | 6 | 24 | 2 | 59 mm | Bad | Rennes in January |
| February | 9° / 3° | 6 | 20 | 2 | 54 mm | Bad | Rennes in February |
| March | 12° / 4° | 4 | 26 | 1 | 48 mm | Ok | Rennes in March |
| April | 15° / 5° | 5 | 25 | 1 | 58 mm | Good | Rennes in April |
| May | 18° / 8° | 5 | 26 | 0 | 71 mm | Good | Rennes in May |
| June | 21° / 11° | 6 | 24 | 0 | 87 mm | Good | Rennes in June |
| July | 23° / 13° | 4 | 27 | 0 | 54 mm | Perfect | Rennes in July |
| August | 23° / 13° | 4 | 27 | 0 | 57 mm | Perfect | Rennes in August |
| September | 22° / 11° | 3 | 27 | 0 | 36 mm | Good | Rennes in September |
| October | 17° / 9° | 4 | 27 | 0 | 60 mm | Good | Rennes in October |
| November | 12° / 6° | 5 | 25 | 0 | 68 mm | Ok | Rennes in November |
| December | 9° / 4° | 6 | 24 | 1 | 72 mm | Ok | Rennes in December |