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July 04, 2009 
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Climate ZonesUSDA Hardiness Zones

Click on an area of the map below to zoom in on your geography.

For Agriculture Canada's Hardiness Zone maps click here

Scroll down to see the Average Annual Minimum Temperature Range for your zone.

Check back soon for more Hardiness Zone maps.

Map


USDA Hardiness Zones and Average Annual Minimum Temperature Range

USDA Zone Temperature Range
        1
 Below -50 F (below -45.6C)
        2a 
-50 to -45 F (-42.8 to -45.5 C) 
        2b 
-45 to -40 F (-40.0 to -42.7 C) 
        3a 
-40 to -35 F (-37.3 to -39.9 C) 
        3b 
-35 to -30 F (-34.5 to -37.2 C) 
        4a 
-30 to -25 F (-31.7 to -34.4 C) 
        4b 
-25 to -20 F (-28.9 to -31.6 C) 
        5a 
-20 to -15 F (-26.2 to -28.8 C) 
        5b 
-15 to -10 F (-23.4 to -26.1 C) 
        6a 
-10 to -5 F (-20.6 to -23.3 C) 
        6b 
-5 to 0 F (-17.8 to -20.5 C) 
        7a 
0 to 5 F (-15.0 to -17.7 C) 
        7b 
5 to 10 F (-12.3 to -14.9 C) 
        8a 
10 to 15 F (-9.5 to -12.2 C) 
        8b 
15 to 20 F (-6.7 to -9.4 C) 
        9a 
20 to 25 F (-3.9 to -6.6 C) 
        9b 
25 to 30 F (-1.2 to -3.8 C) 
       10a 
30 to 35 F (1.6 to -1.1 C) 
       10b 
35 to 40 F (4.4 to 1.7 C) 
       11 
above 40 F (above 4.5 C) 



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