Here's Weather Underground which will show a bit more info about actual race time temps predictions:
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5k (5am to 7:30am) - T+D of 102 to 107 (pace adjustment of +0.5%)
10k (5am to 8:00am) - T+D of 115 to 117 (pace adjustment of +1%)
HM (5am to 10:00am) - T+D of 117 to 125 (pace adjustment of +1.5%)
M (5am to 1:30pm) - not yet available
Data shows that in most areas of the country, these types of predictive forecasts don't beat historical averages until about 5 days out. Precipitation isn't as good as historical weather until 48 hrs out. But from experience, FL seems to have a much higher level of variability than other places in the US. Trust the locals.
Given these possible forecasts, if I were coming from the north and training in 30s right now I'd seriously consider starting some heat acclimation training to dampen the effects of the rise in temps.