If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Barinas: The hottest months are usually February and March, with an average temperature of 27°C, while the coldest months are July and August, with an average of 25°C. The rainiest months in Barinas are June, May, August and July, with each month seeing an average of 267 mm of rainfall.