These zones are based on mean minimum temperatures and represent only an average for areas within the zone. Your location might be a zone or two warmer than the map shows if you live near a large body of water, or a zone or two colder if you live at a high elevation or on a north-facing slope. Adapted from the USDA Plant Climate Zone Map.
Range of average minimum temperatures for each zone:
 | Zone 1 | Below -50° F |  | Zone 6 | -10° to 0° F |
 | Zone 2 | -50° to -40° F |  | Zone 7 | 0° to 10° F |
 | Zone 3 | -40° to -30° F |  | Zone 8 | 10° to 20° F |
 | Zone 4 | -30° to -20° F |  | Zone 9 | 20° to 30° F |
 | Zone 5 | -20° to -10° F |  | Zone 10 | 30° to 40° F |
 | Zone 11 | Above 40° F |