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 Juliaca: The hottest months are usually November and October, with an average temperature of 10°C, while the coldest months are June and July, with an average of 7°C. The rainiest months in Juliaca are February, January, December and March, with each month seeing an average of 204 mm of rainfall.