Plant Hardiness Zone Map - North Midwest US Plant Hardiness Zone Map - North Midwest US

States in this Zone Map:

Iowa, Minnesota, Montana, Nebraska, North Dakota, South Dakota, Wisconsin, Wyoming


Check the color of the section in your area on the map with the color key below.
Zones 2b through 6a represented here.


north-midwest area Color Code Key (+ see below)


Hardiness Zones and Average Annual Minimum Temperature Range

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
Courtesy of the US Dept. of Agriculture.

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