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