Weather remains somewhat stable in St. John. It is reflective of a tropical savanna climate and is affected by mostly moderate trade-winds. This area of the Caribbean is fortunate enough to have revolving warm water currents. As the island is located near the equator and the existence of the warm water current, this island has a high humidity factor as well as stable climate with an average temperature of 79.7. However, due to the relative humidity average of 74%, it has a tendency to feel much warmer.
This area is flanked with mainly by cumulus clouds. These clouds help to provide coverage in the heat at times. However, they do not provide much rain to the area. On average, St. John receives only 40.29" of rain a year. While St. John does not have a specific rainy season, it does have certain months that tend to receive more rain. These months are: November, October, September, August and May. While these months may have more rain, it is not a common occurrence to have rain all day. In fact, most days of rain are scattered showers and produce about .10" of rain or less. The two months for driest weather are February and March, which average less that 2" of rain in each month.
St. John Island has an approximate Bowen Ration of 1:10 as in most ocean areas.