Normally the average daily weather in Hennebont in September is 15 with a normal high in the month being 21 with lows around 12 degrees celsius. We have put some more detail below here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 15 |
| High Temperature | 21 |
| Low Temperature | 12 |
Useful Links: Hennebont Weather: Average Weather & Yearly Climate