Hardiness Zone Activity

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Hardiness Zone Activity
Answer the following questions using the Illinois hardiness zone map.
1. Illinois consists of 5 different hardiness zones. Using the hardiness zone map for Illinois and
the chart below, list the annual average temperature range (Fahrenheit) for the following
zones:
Zone 4b ____________________________
Zone 6a ____________________________
Zone 5a ____________________________
Zone 6b ____________________________
Zone 5b ____________________________
USDA Hardiness Zones and Average Annual Minimum Temperature Range
Zone
Fahrenheit
Celsius
Example Cities
1
Below -50 F
Below -45.6 C
Fairbanks, Alaska; Resolute, Northwest Territories (Canada)
-50 to -45 F
-42.8 to -45.5 C Prudhoe Bay, Alaska; Flin Flon, Manitoba (Canada)
2a
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
-35 to -30 F
-34.5 to -37.2 C Tomahawk, Wisconsin; Sidney, Montana
3b
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; Victorville, 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
2. Locate your county and write what hardiness zone it is located. Name 5 other
counties who share the same hardiness zone as your county.
My County: _____________________________
Hardiness zone:_____________________
5 counties who share the same hardiness zone: ______________________________________
____________________________________________________________________________

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