San Juan County, Washington Hardiness Zones

According to the 2023 USDA Hardiness Zone Map San Juan County, Washington is in Zones 8a (10°F to 15°F), 8b (15°F to 20°F) and 9a (20°F to 25°F). There is no change from the 2012 USDA Hardiness Zone Map which has San Juan County in also in Zones 8a (10°F to 15°F), 8b (15°F to 20°F) and 9a (20°F to 25°F).

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