St. Maarten Temperature In St. Maarten, for a period of record spanning 1971 – 2014 average annual 2m air temperature = 27.1 °C warmest year on record = 28.6 °C in 1998 coldest year on record = 26.2 °C in 1975 warmest month on average = 28.6 °C in August warmest month on record = …