Climate Saint-Joseph has a
tropical rainforest climate (
Köppen climate classification Af). The average annual temperature in Saint-Joseph 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 February, at around . The highest temperature ever recorded in Saint-Joseph was on 20 September 2005; the coldest temperature ever recorded was on 12 January 1979. {{Weather box ==Population==