If you're looking forward to lots of outings with your partner, check out these details about year-round temperatures in Barrancabermeja: The hottest months are usually February and March with an average temp of 81°F, while the coldest months are November and December with an average of 79°F. The rainiest months in Barrancabermeja are May, October, November, and April, with each month seeing an average of 14 inches of rainfall.