If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Hortolandia: The hottest months are usually September and October, with an average temperature of 23°C, while the coldest months are July and June, with an average of 19°C. The rainiest months in Hortolandia are January, December, November and February, with each month seeing an average of 216 mm of rainfall.