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US Agricultural Hardiness Zone Map and Chart
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Basic and Detailed Hardiness Zone Map and Hardiness Zone Chart

USDA Hardiness Zones and Average Annual Minimum Temperature Range
 USDA Zone  Temperature Range Example Cities 
         1 
 Below -50 F 
(below -45.6C)
 Fairbanks, Alaska 
Resolute, Northwest Territories (Canada) 
        2a 
-50 to -45 F 
(-42.8 to -45.5 C) 
 Prudhoe Bay, Alaska 
Flin Flon, Manitoba (Canada) 
        2b 
-45 to -40 F 
(-40.0 to -42.7 C) 
 Unalakleet, Alaska 
Pinecreek, Minnesota 
        3a 
-40 to -35 F 
(-37.3 to -39.9 C) 
 International Falls, Minnesota  
St. Michael, Alaska
        3b 
-35 to -30 F 
(-34.5 to -37.2 C) 
 Tomahawk, Wisconsin 
Sidney, Montana
        4a 
-30 to -25 F 
(-31.7 to -34.4 C) 
 Minneapolis/St.Paul, Minnesota  
Lewistown, Montana
        4b 
-25 to -20 F 
(-28.9 to -31.6 C) 
 Northwood, Iowa  
Nebraska
        5a 
-20 to -15 F 
(-26.2 to -28.8 C) 
 Des Moines, Iowa  
Illinois
        5b 
-15 to -10 F
(-23.4 to -26.1 C) 
 Columbia, Missouri  
Mansfield, Pennsylvania
        6a 
-10 to -5 F
(-20.6 to -23.3 C) 
 St. Louis, Missouri  
Lebanon, Pennsylvania
        6b 
-5 to 0 F 
(-17.8 to -20.5 C) 
 McMinnville, Tennessee 
Branson, Missouri 
        7a 
0 to 5 F 
(-15.0 to -17.7 C) 
 Oklahoma City, Oklahoma  
South Boston, Virginia
        7b 
5 to 10 F 
(-12.3 to -14.9 C) 
 Little Rock, Arkansas 
Griffin, Georgia
        8a 
10 to 15 F 
(-9.5 to -12.2 C) 
 Tifton, Georgia 
Dallas, Texas 
        8b 
15 to 20 F 
(-6.7 to -9.4 C) 
 Austin, Texas  
Gainesville, Florida
        9a 
20 to 25 F 
(-3.9 to -6.6 C) 
 Houston, Texas  
St. Augustine, Florida
        9b 
25 to 30 F 
(-1.2 to -3.8 C) 
 Brownsville, Texas  
Fort Pierce, Florida
       10a 
30 to 35 F 
(1.6 to -1.1 C) 
 Naples, Florida 
Barstow, California
       10b 
35 to 40 F 
(4.4 to 1.7 C) 
 Miami, Florida 
Coral Gables, Florida
        11 
above 40 F 
(above 4.5 C) 
 Honolulu, Hawaii 
Mazatlan, Mexico


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