FLORIDA BUILDING CODE, 6th EDITION (2017)
TABLE 1604.5
RISK CATEGORY OF BUILDINGS AND OTHER STRUCTURES

http://www.floridabuilding.org/fbc/thecode/2017_Code_Development/Wind_Maps/table_1604_5.pdf

Using Wind Speed Maps
Mapped wind speed contour lines delineate wind speed increments of either 5 mph or 10 mph and are not intended to represent a zone's fixed wind speed. Linear interpolation of wind speed between contour lines is permitted. For example, a building situated halfway between the 120 mph and 130 mph contours could be designed for a wind speed of 125 mph based on linear interpolation. Alternatively, a design wind speed of 130 mph could conservatively be used.

http://www.floridabuilding.org/fbc/commission/FBC_0817/Commission/reThink_Wood-Designing_for_High_Winds.pdf