Weather is probably a major factor when you plan your trip to Morelia, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and August with an average temp of 65°F, while the coldest months are December and November with an average of 64°F. The rainiest months in Morelia are April, May, November, and October, with each month seeing an average of 21 inches of rainfall.