Weather is probably a major factor when you plan your trip to Sevilla, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and January with an average temp of 77°F, while the coldest months are July and August with an average of 74°F. The rainiest months in Sevilla are April, May, March, and June, with each month seeing an average of 23 inches of rainfall.