If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Tafi del Valle: The hottest months are usually January and December with an average temp of 73°F, while the coldest months are July and June with an average of 56°F. The rainiest months in Tafi del Valle are January, February, December, and March, with each month seeing an average of 7 inches of rainfall.