Weather is probably a major factor when you plan your trip to Valledupar, and keep in mind that cheaper options are usually available when the weather isn't as good. 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.