If you're looking forward to lots of outings with your partner, check out these details about year-round temperatures in Valledupar: The hottest months are usually March and February with an average temp of 75°F, while the coldest months are December and January with an average of 73°F. The rainiest months in Valledupar are October, May, November, and September, with each month seeing an average of 7 inches of rainfall.