If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Cuyutlan: The hottest months are usually May and July with an average temp of 81°F, while the coldest months are January and February with an average of 76°F. The rainiest months in Cuyutlan are September, August, June, and July, with each month seeing an average of 9 inches of rainfall.