If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Calca: The hottest months are usually October and November with an average temp of 51°F, while the coldest months are July and June with an average of 48°F. The rainiest months in Calca are February, December, January, and March, with each month seeing an average of 14 inches of rainfall.