USDA Hardiness Zones and Average Annual Minimum Temperature Range
| ZonE | Fahrenheit | Celsius | Example Cities |
|---|---|---|---|
| 1 | Below -50 F | Below -45.6 C | Alaska; Resolute, Northwest Territories (Canada) |
| 2a | -50 to-45 F | -42.8 to -45.5 | Bay, Alaska; Flin Flon, Manitoba (Cana |
| 2b | -45 to-40 F | -40.0 to -42.7 | Alaska; Pinecreek, Minnesota |
| 3a | -40 to-35 F | -37.3to-39.9 C | Falls, Minnesota; St. Michael, Alask |
| 3b | -35 to-30 F | -34.5to-37.2 C | Wisconsin; Sidney, Montan |
| 4a | -30 to-25 F | -31.7 to-34.4 C | Minnesota; Lewistown, Montan |
| 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 | -15t o-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 to5 F | -15.0 to-17.7 C | Oklahoma City, Oklahoma; South Boston, |
| 7b | 5 to 10 F | -12.3 to-14.9 C | Little Rock, Arkansas; Griffin, Georgia |
| 8a | 10 to15 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 |
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