The temperatures in Cassis in December are quite cold with temperatures between 8°C and 12°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Cassis 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.
Our weather forecast can give you a great sense of what weather to expect in Cassis in December 2025.
If you’re planning to visit Cassis in the near future, we highly recommend that you review the 14 day weather forecast for Cassis before you arrive.
Temperatures
12° / 8°
Rainy Days
4
Snowy Days
0
Dry Days
27
Rainfall
77
mm
Sun Hours
10.4
Hrs