|
USDA Zone |
Temperature
Range |
Example Cities |
|
1 |
Below -50
F (-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 (4.5
C) |
Honolulu, Hawaii
Mazatlan, Mexico |