If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Hortolandia: The hottest months are usually September and October with an average temp of 74°F, while the coldest months are July and June with an average of 66°F. The rainiest months in Hortolandia are January, December, November, and February, with each month seeing an average of 8 inches of rainfall.