You can plan your beach trip with this snapshot of year-round temperatures in Técpan de Galeana: The hottest months are usually May and July with an average temp of 80°F, while the coldest months are February and January with an average of 78°F. The rainiest months in Técpan de Galeana are September, August, June, and October, with each month seeing an average of 10 inches of rainfall.