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Planting calendar for ZIP 99403 (Clarkston, WA)

When to plant vegetables in Clarkston, WA (USDA hardiness zone 7b). Typical last spring frost around Apr 6, 2026 14 days year to year), first fall frost around Oct 26, 202613 days).

Playing it safe? Spring frost holds off until about Apr 23, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Clarkston, WA planting calendar for dates typical of the whole city.

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Month by month in Clarkston, WA

January

February

March

April

May

August

Understand your frost dates

Frost dates for ZIP 99403: NOAA 1991-2020 normals (USW00024149 LEWISTON NEZ PERCE CO AP, ID US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.