The weather in Sisteron in December is very cold with temperatures between 2°C and 9°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Sisteron 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 Sisteron can expect a few days of snow in December.
Our weather forecast can give you a great sense of what weather to expect in Sisteron in December 2025.
If you’re planning to visit Sisteron in the near future, we highly recommend that you review the 14 day weather forecast for Sisteron before you arrive.
Temperatures
9° / 2°
Rainy Days
5
Snowy Days
1
Dry Days
25
Rainfall
68
mm
Sun Hours
9.7
Hrs