The weather in Rennes in December is very cold with temperatures between 4°C and 9°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Rennes during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Rennes can expect a few days of snow in December.
Our weather forecast can give you a great sense of what weather to expect in Rennes in December 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
9° / 4°
Rainy Days
6
Snowy Days
1
Dry Days
24
Rainfall
72
mm
Sun Hours
7.9
Hrs