Weather will likely play an important role when you plan your trip to Corumba, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and October with an average temp of 83°F, while the coldest months are July and June with an average of 74°F. The rainiest months in Corumba are February, January, March, and December, with each month seeing an average of 8 inches of rainfall.