Go to Hardiness Zone Map
at this site or click the pictured links above for usda.gov.
Oregon, Idaho, Montana, Washington, Wyoming
Check the color of the section in your area of the map with the color key below.
Go to Hardiness Zone Map.
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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 |
