<P> 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 . </P> <P> Like the remainder of the Southeastern United States, Florida has a winter maximum in dense fog conditions . Unlike the remainder of the region, the maximum in Florida contains roughly half of the annual occurrences per year, on average . Its summer minimum is less than the remainder of the Southeast . The annual number of heavy fog days (with visibility of . 25 miles (0.40 km) or less) has ranged from 50 in Tallahassee, to 1 in Key West, the least foggy region in the state . The two types of fog that are most common in Florida are advection and radiational . Fog can be hazardous to early morning commuters . On January 9, 2008, when fog on Interstate 4 combined with smoke from a nearby fire, visibility was reduced to nearly zero . As a result, five individuals died in a 70 - car pileup . </P> <P> Statewide, the highest rainfall amounts occur during the summer months . In northern Florida, there is a weak winter secondary maximum while statewide the driest months of the year are during the spring . During El Niño, Florida sees greater rainfall between November and March . Due to the lack of the secondary maximum across the peninsula, a distinct dry season is seen in the averages from winter through spring . This dry season provokes brush fires annually as temperatures rise during the late spring, before they fade during early June as the rainy season gets underway . </P> <P> The heaviest rainfall to occur in 24 hours was measured in Yankeetown during Hurricane Easy (1950), 38.70 inches (98.3 cm). This is also the highest known point storm total maximum related to any tropical cyclone which has impacted Florida, and by itself would be the highest known rainfall total for any month from any location within Florida . This rainfall amount remained the national 24 - hour rainfall record until Tropical Storm Claudette (1979). Heavy rainfall events have fallen due to stalled fronts near the state as well, and occur during the March through May and October through November timeframe . </P>

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