If you're looking forward to lots of outings with your partner, check out these details about year-round temperatures in Isla Mucura: The hottest months are usually February and March with an average temp of 82°F, while the coldest months are November and December with an average of 80°F. The rainiest months in Isla Mucura are October, August, September, and June, with each month seeing an average of 10 inches of rainfall.