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 Tilcara: The hottest months are usually January and December, with an average temperature of 22°C, while the coldest months are July and June, with an average of 14°C. The rainiest months in Tilcara are February, January, December and March, with each month seeing an average of 252 mm of rainfall.