Chantonnay () is a commune in the Vendée department in the Pays de la Loire region in western France. Geography The river Lay flows southwestward through the commune and forms part of its eastern and southern borders. Climate Chantonnay has a oceanic climate (Köppen climate classification Cfb). The average annual temperature in Chantonnay is . The average annual rainfall is with November 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 Chantonnay was on 27 June 2019; the coldest temperature ever recorded was on 15 February 1956. Population See also Communes of the Vendée department References Communes of Vendée