If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Colbún: The hottest months are usually January and February with an average temp of 69°F, while the coldest months are July and August with an average of 49°F. The rainiest months in Colbún are June, August, July, and May, with each month seeing an average of 7 inches of rainfall.