If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Tlaquiltenango: The hottest months are usually April and March with an average temp of 72°F, while the coldest months are January and December with an average of 65°F. The rainiest months in Tlaquiltenango are September, June, August, and July, with each month seeing an average of 9 inches of rainfall.