1990 Maine USDA Plant Hardiness Zone Map

Historical Map — 1990 USDA Data: For current planting zone information view the 2023 Maine USDA Hardiness Zone Map .

The 1990 USDA Plant Hardiness Zone Map for Maine was the official USDA zone reference for over two decades. It was based on average annual extreme minimum winter temperature data collected from 1974 to 1986. Use the table below to compare 1990 zones to the revised 2012 zones and the current 2023 zones.

Map Cities Related Source

1990 Maine Hardiness Zone Map

Click on the map for zone information. Use the legend icon (lower right) to view the color key. Use the layers control (upper right) to toggle county boundaries and state border.

List of 1990 Hardiness Zones for Locations in Maine

Location1990 Hardiness Zone2012 Zone2023 Zone
Auburn5b — -15°F to -10°F5b — -15°F to -10°F5b — -15°F to -10°F
Augusta5a — -20°F to -15°F5b — -15°F to -10°F5b — -15°F to -10°F
Bangor5a — -20°F to -15°F5a — -20°F to -15°F5a — -20°F to -15°F
Bath5b — -15°F to -10°F5b — -15°F to -10°F5b — -15°F to -10°F
Belfast5b — -15°F to -10°F5b — -15°F to -10°F5b — -15°F to -10°F
Biddeford5a — -20°F to -15°F5b — -15°F to -10°F6a — -10°F to -5°F
Brewer5a — -20°F to -15°F5a — -20°F to -15°F5a — -20°F to -15°F
Brunswick5b — -15°F to -10°F5b — -15°F to -10°F5b — -15°F to -10°F
Buxton5a — -20°F to -15°F5b — -15°F to -10°F5b — -15°F to -10°F
Cape Elizabeth5b — -15°F to -10°F5b — -15°F to -10°F6b — -5°F to 0°F
Caribou4a — -30°F to -25°F4a — -30°F to -25°F4a — -30°F to -25°F
Ellsworth5a — -20°F to -15°F5b — -15°F to -10°F5b — -15°F to -10°F
Gardiner5a — -20°F to -15°F5a — -20°F to -15°F5b — -15°F to -10°F
Gorham5a — -20°F to -15°F5b — -15°F to -10°F5b — -15°F to -10°F
Hermon5a — -20°F to -15°F5a — -20°F to -15°F5a — -20°F to -15°F
Kennebunk5a — -20°F to -15°F5b — -15°F to -10°F6a — -10°F to -5°F
Lebanon5a — -20°F to -15°F5b — -15°F to -10°F5b — -15°F to -10°F
Lewiston5b — -15°F to -10°F5b — -15°F to -10°F5b — -15°F to -10°F
New Gloucester5b — -15°F to -10°F5b — -15°F to -10°F5b — -15°F to -10°F
North Windham5a — -20°F to -15°F5b — -15°F to -10°F5b — -15°F to -10°F
Oak Hill5a — -20°F to -15°F5b — -15°F to -10°F6a — -10°F to -5°F
Old Orchard Beach5b — -15°F to -10°F5b — -15°F to -10°F6a — -10°F to -5°F
Old Town5a — -20°F to -15°F5a — -20°F to -15°F5a — -20°F to -15°F
Orono5a — -20°F to -15°F5a — -20°F to -15°F5a — -20°F to -15°F
Paris5a — -20°F to -15°F5a — -20°F to -15°F5a — -20°F to -15°F
Poland5a — -20°F to -15°F5a — -20°F to -15°F5b — -15°F to -10°F
Portland5b — -15°F to -10°F5b — -15°F to -10°F6a — -10°F to -5°F
Presque Isle4a — -30°F to -25°F4a — -30°F to -25°F4a — -30°F to -25°F
Rockland5b — -15°F to -10°F6a — -10°F to -5°F6a — -10°F to -5°F
Saco5a — -20°F to -15°F5b — -15°F to -10°F6a — -10°F to -5°F
Sanford5a — -20°F to -15°F5b — -15°F to -10°F5b — -15°F to -10°F
Scarborough5b — -15°F to -10°F5b — -15°F to -10°F6a — -10°F to -5°F
Skowhegan4b — -25°F to -20°F4b — -25°F to -20°F5a — -20°F to -15°F
South Portland5b — -15°F to -10°F5b — -15°F to -10°F6a — -10°F to -5°F
Topsham5b — -15°F to -10°F5b — -15°F to -10°F5b — -15°F to -10°F
Waterboro5a — -20°F to -15°F5a — -20°F to -15°F5b — -15°F to -10°F
Waterville4b — -25°F to -20°F5a — -20°F to -15°F5b — -15°F to -10°F
Wells5b — -15°F to -10°F5b — -15°F to -10°F6a — -10°F to -5°F
Westbrook5a — -20°F to -15°F5b — -15°F to -10°F5b — -15°F to -10°F
Winslow4b — -25°F to -20°F5a — -20°F to -15°F5b — -15°F to -10°F
Yarmouth5b — -15°F to -10°F5b — -15°F to -10°F6a — -10°F to -5°F

1990 Hardiness Zone Maps for Neighboring States

Data Source & Methodology

The 1990 USDA Plant Hardiness Zone Map was produced by the U.S. Department of Agriculture (USDA) Agricultural Research Service (ARS) in collaboration with the American Horticultural Society. It served as the official US planting zone reference from 1990 until the 2012 revision.

  • Publisher: USDA Agricultural Research Service (ARS)
  • Year Published: 1990
  • Climate Data Period: 1974–1986
  • Zone Basis: Average annual extreme minimum winter temperature
  • Number of Zones: 11 zones (1–11), each divided into a and b half-zones

Official source: USDA Plant Hardiness Zone Map — planthardiness.ars.usda.gov

This interactive map presentation is provided by PlantMaps. The underlying hardiness zone boundary data is sourced from the USDA Agricultural Research Service. Zone assignments for individual cities and towns are derived from PlantMaps climate data.

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