Visiting local bars in Fomboni is more fun in good weather. These temperatures and rainfall averages can help you determine the best time for bar hopping. The hottest months are usually March and December with an average temp of 82°F, while the coldest months are August and September with an average of 78°F. The rainiest months in Fomboni are January, February, March, and December, with each month seeing an average of 9 inches of rainfall.