Climatic Zones  (Approximate lowest temperatures in the Winter.)

Zone 1   -50 degrees F

Zone 2   -45 degrees F

Zone 3   -40 degrees F

Zone 4   -38 degrees F

Zone 5   -28 degrees F

Zone 6   -25 degrees F

Zone 7   -15 degrees F

Zone 8   -5 degrees F

Zone 9   -2 degrees F

Zone 10  0 degrees. F