Like was said before, check weather.com a few days before departure.
It can be in the 80s one day, and if a front moves through down into the 50s or 60s the next. Case in point, The Daytona 500 weekend this year (02/18 and 19). On Saturday we sat in the stands and roasted. On Sunday we sat in the stands with jackets, a fine mist falling and a north wind blowing.
Be prepared for just about anything.