About Hennebont, Brittany's Climate & Weather History

With a population of around 14,300, Hennebont sits in Brittany, France. The city operates in the Central European time zone.

In 2025, Hennebont recorded an average annual temperature of 55°F. The hottest temperatures reached 91°F in August; the coolest were 26°F in January. Total precipitation for the year was 43 inches, with the wettest month being January.