 During the summer , minima range from near 70 ° F ( 21 ° C ) in northern Florida to near 80 ° F ( 27 ° C ) in the Keys . High temperatures during the summer average in the lower 90s Fahrenheit statewide . Relief from the heat during the summer comes in the form of afternoon and evening thunderstorm activity , late morning and afternoon sea breezes off the relatively cooler ocean , and during the passage of a tropical cyclone . The passage of a cold front through the state is rare during the warm season . The record high temperature for the state is 109 ° F ( 43 ° C ) at Monticello in 1931 . 
