The temperatures in Sisteron in May are quite cold with temperatures between 9°C and 22°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Sisteron during the month of May. 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 Sisteron in May 2026.
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
22° / 9°
Rainy Days
5
Snowy Days
0
Dry Days
26
Rainfall
75
mm
Sun Hours
11.0
Hrs
