CourniouCourniou is a commune in the Hérault department in southern France.WWW mairie-courniou-34.comGeographyClimateCourniou has a warm-summer mediterranean climate. The average annual temperature in Courniou is. The average annual rainfall is with December as the wettest month. The temperatures are highest on average in July, at around, and lowest in January, at around. The highest temperature ever recorded in Courniou was on 12 August 2003; the coldest temperature ever recorded was on 16 January 1985.