Frost dates in Columbia County, Washington

Evergreen forest with snowy peaks behind in Mount Rainier National Park, Washington — Photo: Kingofthedead, CC BY-SA 4.0, via Wikimedia Commons

The average last spring frost in Columbia County falls Apr 28 and the average first fall frost Oct 13, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 7a to 7b. Places: Dayton, Starbuck. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.

ZIP	Place	Last spring frost	First fall frost	Zone
99328	Dayton	Apr 28	Oct 13	7a
99359	Starbuck	Apr 28	Oct 13	7b

Nearby counties

Garfield County Walla Walla County Asotin County Franklin County Adams County Whitman County

All Washington counties · Download Washington frost dates (CSV)

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