If you're looking forward to lots of outings with your partner, check out these details about year-round temperatures in Juan de Acosta: The hottest months are usually March and February with an average temp of 82°F, while the coldest months are January and February with an average of 81°F. The rainiest months in Juan de Acosta are October, September, August, and November, with each month seeing an average of 11 inches of rainfall.