Weather is probably a major factor when you plan your trip to Catemaco, and keep in mind that cheaper options are usually available when the weather isn’t as good. The hottest months are usually May and April with an average temp of 79°F, while the coldest months are January and February with an average of 71°F. The rainiest months in Catemaco are October, September, November, and August, with each month seeing an average of 14 inches of rainfall.