Planning for the weather is an important factor for making your trip to Santa María Colotepec a success, especially when you're splurging. The hottest months are usually April and May with an average temp of 81°F, while the coldest months are December and January with an average of 77°F. The rainiest months in Santa María Colotepec are September, June, October, and August, with each month seeing an average of 20 inches of rainfall.