Weather in Brest in the course of September is 14. Through the month the highs are about 19 and average daily low being 12 degrees celsius. We have put some more info below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 14 |
| High Temperature | 19 |
| Low Temperature | 12 |
Useful Links: Brest Weather: Average Weather & Yearly Climate