No. Almost no chance. Source: grew up in Florida. You might hit 84 or even 82, but don't expect to get out of the 80s until after the sun goes down. Humidity will still be high. If you get lucky (good or bad luck, depending on your POV) you might hit a hurricane that drops the temps and pulls the humidity out of the area immediately before or after the storm. Expect temps in the mid-80s, with high humidity. That's still the right time of year for an afternoon thunderstorm, but definitely keep an eye on the weather while you pack the week before. Honestly, though I can count on my hand the number of Halloweens when it was cool enough to wear jeans instead of jean shorts.
And I'll add the exception: I was at
MNSSHP last Nov 1. It was downright cold. I wore a long sleeved shirt under my sun dress and was still chilled. So I guess there is a chance, it's just really really small.