[QUOTE=AnnaMC;1109186]Thanks Hound Dog! I live in the deep south, and am very familiar with hot and humid wx. I do, however enjoy the more spring like weather that highlands will offer.[/QUOTE]
Well, Anna, Dawg was born and raised near Mobile on the Alabama coast and my wife was raised in Paris. She came to Mobile to to teach French for a year or two in 1970 and made the terrible mistake of marrying me. We lived for two years on Mobile Bay just above Dauphin Island and that summer climate was something she had never encountered before moving to the Mobile area. It damn near killed her so we moved to cool and foggy San Francisco and made our residence in Northern California for some 30 plus years before moving to Mexico in retirement.
We now live at 5,000 feet at Lake Chapala and 7,000 feet in the Chiapas High;lands. At one time some seven years ago we considered moving to the Yucatan to Merida, the Yucatecan Gulf Coast somewhere between Chicxulub and Isla Holbox or Lake Bacalar.. There are many things we really like about the city of Merida and also the Gulf Coast north and east of Merida but the almost year round excessively hot and humid climate was too much for us to take so we moved instead to the Chiapas Highlands at 7,000 feet and visit Merida and the Yucatan from there with regularity. Even though you are from the U.S. deep south, you may find the stifling year round heat of the Yucatan difficult. At least in Mobile the fall, winter and spring are very pleasant but in Merida there is very little relief.
Also, before you set your mind on Costa Rica, keep in mind that the weather on the coast there is also excessively hot and humid with a great deal of rain. While there are coolish highlands, think carefully about what I hear are problems some expats have experienced with isolation and bad to impassable roads entering and leaving the highlands during the rainy season, I have not been to Costa Rica so I say the above just based on what I have heard from others who have moved there.
Good luck on your search. We had the U.S., France and Latin America available toi us for retirement, chose Highland Mexico and have never regretted it for a minute.