Zone Map

North-Midwest US

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

region zonemap zone key


USDA Hardiness Zones and Average Annual Minimum Temperature Range

USDAZone TemperatureRange 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

(-40.0to -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

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