CaulnesCaulnes is a commune in the Côtes-d'Armor department of Brittany in northwestern France.WWW Official SiteGeographyClimateCaulnes has an oceanic climate. The average annual temperature in Caulnes is. The average annual rainfall is with November as the wettest month. The temperatures are highest on average in August, at around, and lowest in January, at around. The highest temperature ever recorded in Caulnes was on 5 August 2003; the coldest temperature ever recorded was on 2 January 1997.PopulationInhabitants of Caulnes are called Caulnais in French.