If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in San Pablo del Lago: 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.