What plant hardiness zone is Sudden Valley

Sudden Valley is located at Whatcom County, Washington (WA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Sudden Valley is 8a by the USDA scale.

Coldest zone's winter temperature is +10 … +15 °F.

Plants of 8a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 8a USDA.

Sudden Valley, Washington @ wikipedia.