Weather will likely play an important role when you plan your trip to San Pablo del Lago, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and October with an average temp of 56°F, while the coldest months are August and July with an average of 55°F. The rainiest months in San Pablo del Lago are April, November, March, and February, with each month seeing an average of 11 inches of rainfall.