Florida climate

Florida Plant Hardiness Zones

Florida’s towns run from zone 8b to zone 11b: the average coldest winter night is 49.3°F at Stock Island and 19°F at Century.

Hardiness zones in Florida

In USDA’s colors, neighboring states washed out. Zones follow elevation, coasts and cities down to half a mile. Drawn by WeatherOverTime from the USDA-ARS and Oregon State University PRISM Climate Group 2023 GIS data; this is not the official USDA Plant Hardiness Zone Map.

Map of the 2023 plant hardiness zones across Florida, from zone 8b to zone 11b, with the state’s border drawn.
  • 8b
  • 9a
  • 9b
  • 10a
  • 10b
  • 11a
  • 11b

Open the live map with plant hardiness zones

Towns by zone

Each town’s 1991-2020 average annual extreme minimum at its center, read from the map’s 800 m grid. Warmest zone first.

11b Zone 11b, 45 to 50°F 11 towns

11a Zone 11a, 40 to 45°F 120 towns

10b Zone 10b, 35 to 40°F 149 towns

10a Zone 10a, 30 to 35°F 253 towns

9b Zone 9b, 25 to 30°F 195 towns

9a Zone 9a, 20 to 25°F 135 towns

8b Zone 8b, 15 to 20°F 4 towns

Counties

At the county’s center; a county with hills or a coast spans several zones.

CountyZone at the centerAverage coldest night
Alachua County9a23°F
Baker County9a22.3°F
Bay County9a23.9°F
Bradford County9a23.8°F
Brevard County10a33.1°F
Broward County10b39.3°F
Calhoun County9a21.8°F
Charlotte County10a31.9°F
Citrus County9b25.1°F
Clay County9a24°F
Collier County10a33.6°F
Columbia County9a22.8°F
DeSoto County9b29°F
Dixie County9a21.5°F
Duval County9b26.9°F
Escambia County9a21.7°F
Flagler County9b26.9°F
Franklin County9a24.3°F
Gadsden County9a21.4°F
Gilchrist County9a22.4°F
Glades County10a30.9°F
Gulf County9a24.2°F
Hamilton County9a21.4°F
Hardee County9b29°F
Hendry County10a32.2°F
Hernando County9b26°F
Highlands County9b29.9°F
Hillsborough County10a30.7°F
Holmes County8b18.9°F
Indian River County10a31.1°F
Jackson County9a21.6°F
Jefferson County9a21.8°F
Lafayette County9a21.4°F
Lake County9b27.8°F
Lee County10b35.8°F
Leon County9a21.3°F
Levy County9a23.8°F
Liberty County9a21.2°F
Madison County9a22.3°F
Manatee County10a30°F
Marion County9a24.8°F
Martin County10a34°F
Miami-Dade County10b38.5°F
Monroe County10b37.4°F
Nassau County9a23.4°F
Okaloosa County9a20.3°F
Okeechobee County10a30.7°F
Orange County10a31.8°F
Osceola County9b29.8°F
Palm Beach County10b35.3°F
Pasco County9b27.3°F
Pinellas County10a34.8°F
Polk County10a30.9°F
Putnam County9b25.6°F
Saint Johns County9b27.3°F
Saint Lucie County10a32.1°F
Santa Rosa County9a21.2°F
Sarasota County10a31.4°F
Seminole County9b29.7°F
Sumter County9b25.1°F
Suwannee County9a22.3°F
Taylor County9a22.2°F
Union County9a22.8°F
Volusia County9b27.9°F
Wakulla County9a22.1°F
Walton County9a21.3°F
Washington County9a20.5°F

The zones

A plant hardiness zone is set by the average of each winter’s single coldest temperature, 1991 to 2020: zones are 10°F apart and each half zone, a and b, 5°F. It says how cold a winter night usually gets, not the coldest it has ever been, and nothing about summer heat, rain or soil. Plant labels give the coldest zone a perennial survives in.

ZoneAverage coldest nightIn Celsius
8b15 to 20°F-9.4 to -6.7°C
9a20 to 25°F-6.7 to -3.9°C
9b25 to 30°F-3.9 to -1.1°C
10a30 to 35°F-1.1 to 1.7°C
10b35 to 40°F1.7 to 4.4°C
11a40 to 45°F4.4 to 7.2°C
11b45 to 50°F7.2 to 10.0°C

Sources

Hardiness zones: USDA Plant Hardiness Zone Map, 2023, Agricultural Research Service, U.S. Department of Agriculture, from the GIS data of the PRISM Climate Group, Oregon State University, which may be freely reproduced and redistributed. Drawn by WeatherOverTime from the USDA-ARS and Oregon State University PRISM Climate Group 2023 GIS data; this is not the official USDA Plant Hardiness Zone Map.