Whitman County, Washington Hardiness Zones

According to the 2023 USDA Hardiness Zone Map Whitman County, Washington is in Zones 6b (-5°F to 0°F), 7a (0°F to 5°F) and 7b (5°F to 10°F). This is a change from the 2012 USDA Hardiness Zone Map which has Whitman County in Zones 6a (-10°F to -5°F), 6b (-5°F to 0°F), 7a (0°F to 5°F) and 7b (5°F to 10°F).

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