Weather is probably a major factor when you plan your trip to Baños de Agua Santa, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually November and October with an average temp of 52°F, while the coldest months are July and August with an average of 49°F. The rainiest months in Baños de Agua Santa are April, March, May, and November, with each month seeing an average of 15 inches of rainfall.