If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Barrancabermeja: The hottest months are usually February and March, with an average temperature of 27°C, while the coldest months are November and December, with an average of 26°C. The rainiest months in Barrancabermeja are May, October, November and April, with each month seeing an average of 356 mm of rainfall.