La Trinité is a town and commune in the French overseas region and department of Martinique. La Trinité has a tropical rainforest climate. …La Trinité is a town and commune in the French overseas region and department of Martinique. La Trinité has a tropical rainforest climate. The average annual temperature in La Trinité is 26.4 °C. The average annual rainfall is 2,294.8 mm with October as the wettest month. The temperatures are highest on average in September, at around 27.6 °C, and lowest in February, at around 25.0 °C. The highest temperature ever recorded in La Trinité was 34.4 °C on 25 September 2011; the coldest temperature ever recorded was 18.7 °C on 2 February 2008.