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yankee gardener garden data, home gardeners, Arizona, California, Nevada, Utah, Southwest, South-West, 50 States, USA, Annual Temperature, Minimum Temperature Range

USDA Plant Hardiness Zone Map

Southwestern United States

South-West US

Arizona, California, Nevada, Utah

Check the color of the section in your area of the map with the color key below.
Zones 5b through 10b represented here.

south-west area, Southwest, South-West, 50 States, USA, Arizona, California, Nevada, Utah, Annual Temperature, Minimum Temperature Range  Temperature Color Code, Southwest, South-West, 50 States, USA, Arizona, California, Nevada, Utah, Annual Temperature, Minimum Temperature Range

USDA Hardiness Zones and Average Annual Minimum Temperature Range
USDA Zone Temperature Range Example Cities
1 Below -50 F
(-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
5a -20 to -15 F
(-26.2 to -28.8 C)
Des Moines, Iowa
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

Listed by zone. -- Names of representative plants listed under the coldest zones in which they normally succeed.
Listed alphabetically. -- Cold hardiness ratings (zones) for selected woody plants.

Go to the USDA Hardiness Zone Map

USDA Miscellaneous Publication No. 1475. Issued January 1990
Authored by Henry M. Cathey while Director, U.S. National Arboretum
Edited, formatted and prepared for the US National Arboretum web site by Ramon Jordan, March 1998
U.S. National Arboretum, Agricultural Research Service, U.S. Department of Agriculture,
Washington, DC 20002.

Updated and edited, by Yankee Gardener, February 2001

Back to the USDA Hardiness Zone Map Introduction Page

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