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 Villarrica: The hottest months are usually January and February, with an average temperature of 15°C, while the coldest months are July and August, with an average of 6°C. The rainiest months in Villarrica are June, August, July and May, with each month seeing an average of 355 mm of rainfall.