"They are mostly in homes and cabins though"
You mean the ones made out of poured concrete with no insulation, or 1/2" plywood with no insulation? Halfway down the peninsula I have awakened to 49 degree mornings rising to 63 and a stiff wind. The only dependable warmer winter weather is found at the capes.
For consistent warm weather in the winter one has to go south of Manzanillo Colima. It was no joke that for three weeks I went to bed in 53 degree December weather in Boca de Iguanas. South of Manzanillo, a December morning is around 72 rising to the eighties in the afternoon. Depends on your definition of the word "warm".