Climate Saint-Fulgent has an
oceanic climate (
Köppen climate classification Cfb). The average annual temperature in Saint-Fulgent 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 Saint-Fulgent was on 18 July 2022; the coldest temperature ever recorded was on 12 February 2012. {{Weather box|width=auto ==Population==