Powder River County, Montana, MT, USA plant hardiness zones (gardening zones)

Plant hardiness zones (winter frost zones or gardening zones) range for Powder River County, Montana (MT), USA is:

• 4a

by the USDA scale.

• coldest zone's winter temperature: −30 … -25 °F

Cities of Powder River County, Montana (MT), USA

• BiddleUSDA hardiness zone: 4a
• BroadusUSDA hardiness zone: 4a
• OliveUSDA hardiness zone: 4a
• OtterUSDA hardiness zone: 4a
• PowdervilleUSDA hardiness zone: 4a
• SonnetteUSDA hardiness zone: 4a