If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Lo de Marcos: The hottest months are usually May and June with an average temp of 79°F, while the coldest months are February and January with an average of 71°F. The rainiest months in Lo de Marcos are August, September, July, and June, with each month seeing an average of 10 inches of rainfall.