The temperatures in Douarnenez in September are usually low and can range between 13°C and 20°C.
You can expect about 3 to 8 days of rain in Douarnenez during the month of September. 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 Douarnenez in September 2026.
If you’re planning to visit Douarnenez in the near future, we highly recommend that you review the 14 day weather forecast for Douarnenez before you arrive.
Temperatures
20° / 13°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
60
mm
Sun Hours
9.8
Hrs
