Weather is probably a major factor when you plan your trip to San Juan de Alima, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and July with an average temp of 81°F, while the coldest months are January and February with an average of 76°F. The rainiest months in San Juan de Alima are September, August, June, and July, with each month seeing an average of 9 inches of rainfall.