Lewis and Clark County, Montana, MT, USA plant hardiness zones (gardening zones)

Plant hardiness zones (winter frost zones or gardening zones) range for Lewis and Clark County, Montana (MT), USA is:

• 4a
• 4b

by the USDA scale.

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

• warmest zone's winter temperature: −25 … -20 °F

Cities of Lewis and Clark County, Montana (MT), USA

• AugustaUSDA hardiness zone: 4a
• Canyon CreekUSDA hardiness zone: 4b
• CraigUSDA hardiness zone: 4b
• East HelenaUSDA hardiness zone: 4b
• Fort HarrisonUSDA hardiness zone: 4b
• HelenaUSDA hardiness zone: 4b
• Helena Valley NortheastUSDA hardiness zone: 4b
• Helena Valley NorthwestUSDA hardiness zone: 4a
• Helena Valley SoutheastUSDA hardiness zone: 4b
• Helena Valley West CentralUSDA hardiness zone: 4b
• Helena West SideUSDA hardiness zone: 4b
• LincolnUSDA hardiness zone: 4a
• MarysvilleUSDA hardiness zone: 4b
• WilbornUSDA hardiness zone: 4a
• Wolf CreekUSDA hardiness zone: 4b