BACK to the complete zone map.

Hardiness Zone Map Zone Color Key

USDA Hardiness Zones and Average Annual Minimum Temperature Range

  Zone  
  Fahrenheit  
    Celsius    
  Example Cities  
1
 Below -50 F  
Below -45.6 C
 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;   Victorville, 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