Wahkiakum County, Washington, WA, USA plant hardiness zones (gardening zones)

Plant hardiness zones (winter frost zones or gardening zones) range for Wahkiakum County, Washington (WA), USA is:

• 8b

by the USDA scale.

• coldest zone's winter temperature: +15 … +20 °F

Cities of Wahkiakum County, Washington (WA), USA

• AltoonaUSDA hardiness zone: 8b
• CathlametUSDA hardiness zone: 8b
• Deep RiverUSDA hardiness zone: 8b
• East CathlametUSDA hardiness zone: 8b
• Grays RiverUSDA hardiness zone: 8b
• RosburgUSDA hardiness zone: 8b
• SkamokawaUSDA hardiness zone: 8b