I find that the very humid tropical climate of south florida, that lasts 9 months a year, interupts my hour long walks outdoors even in a.m. advice?

High: Humidity is tough to exercise in. Find a mall or air conditioned area to do your walks in. An hour of walking. Is good no matter where it is. Similar to up north where too cold to walk in winter. Head indoors

Indoor exercise.: I fully agree that exercising in hot humid weather can be risky. That being said, you can always exercise indoors. I know it's an investment, but you may wish to buy a treadmill, elliptical machine, exercise bicycle. With nine months every year, it sounds like you'd put it to good use.