There is a reconstructed fort up at Hillsborough River State Park. (This is northeast of Tampa, so a lot farther north than the Everglades.) The original was built during the Seminole Wars in 1836, about a hundred years before someone invented window screens. In fact, the original fort had only wooden shutters over the windows, not even any glass windows that could be opened and closed.
Anyway, during a tour a few years ago, we were told that the soldiers found the temperatures and the mosquitoes so bad during June, July, and August that they regularly abandoned the fort during those months, and came back only when it cooled off in September!
We often forget that the heat, humidity, and bugs were major reasons why much of Florida was not settled as early as other states, and that it was only the invention of air conditioning that made it habitable for the hoards of people who live here now.