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 Canelos: The hottest months are usually September and October, with an average temperature of 19°C, while the coldest months are July and August, with an average of 18°C. The rainiest months in Canelos are April, May, June and March, with each month seeing an average of 431 mm of rainfall.