Lewis County, Washington is in USDA Hardiness Zones 6a, 6b, 7a, 7b, 8a and 8b

Lewis County, Washington Hardiness Zone Map

Lewis County Border
Zone 6a
-10°F to -5°F
Zone 6b
-5°F to 0°F
Zone 7a
0°F to 5°F
Zone 7b
5°F to 10°F
Zone 8a
10°F to 15°F
Zone 8b
15°F to 20°F

A hardiness zone is a geographically defined area in which a specific category of plant life is capable of growing, as defined by climatic conditions, including its ability to withstand the minimum temperatures of the zone.

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