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USDA Plant Hardiness Zone Map
Southwest US:  Arizona, California, Nevada, Utah

[Back to the Zone Map Page] [Back to Main Page]

Check the color of the section in your area of the map with the color key below. Zones 5b through 10b represented here

  south-west area

USDA Hardiness Zones and Average Annual Minimum
Temperature Range

 USDA Zone

Temperature Range Example Cities

-15 to -10 F  (-23.4 to -26.1 C)

Columbia, Missouri 
Mansfield, Pennsylvania

-10 to -5 F  (-20.6 to -23.3 C)

St. Louis, Missouri 
Lebanon, Pennsylvania

-5 to 0 F  (-17.8 to -20.5 C)

McMinnville, Tennessee
Branson, Missouri 

0 to 5 F (-15.0 to -17.7 C)

Oklahoma City, Oklahoma 
South Boston, Virginia

5 to 10 F (-12.3 to -14.9 C)

Little Rock, Arkansas
Griffin, Georgia

10 to 15 F  (-9.5 to -12.2 C)

Tifton, Georgia
Dallas, Texas 

15 to 20 F  (-6.7 to -9.4 C)

Austin, Texas
Gainesville, Florida

20 to 25 F  (-3.9 to -6.6 C)

Houston, Texas
St. Augustine, Florida

25 to 30 F  (-1.2 to -3.8 C)

Brownsville, Texas
Fort Pierce, Florida


30 to 35 F (1.6 to -1.1 C) 

Naples, Florida
Barstow, California


35 to 40 F  (4.4 to 1.7 C) 

Miami, Florida
Coral Gables, Florida

Listed by zone: Names of representative plants listed under the coldest zones in which they normally succeed.
Listed alphabetically: Cold hardiness ratings (zones) for selected woody plants.

Data based on USDA Miscellaneous Publication No. 1475.  Issued January 1990, U.S. National Arboretum, Agricultural Research Service, U.S. Department of Agriculture, Washington, DC 20002.


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Updated on February 18, 2018