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.
Temperatures
17° / 9°
Rainy Days
4
Snowy Days
0
Dry Days
27
Rainfall
60
mm
Sun Hours
8.9
Hrs
