I did it two week ago on a fishing trip it was 96 in the day with 88% humidity and only got to 80 that night. But i can handle it fine because i live without a/c.Try that in Tampa in August. 95 degrees, steambath humidity, blazing sun interspersed with lightning-filled deluges...every day. 80 and humid at night, not a breath of wind.
Even my wife, who considers 90 degrees no big deal, found it brutal.