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Planting calendar for ZIP 99116 (Coulee Dam, WA)

When to plant vegetables in Coulee Dam, WA (USDA hardiness zone 7a). Typical last spring frost around Apr 22, 2026 13 days year to year), first fall frost around Oct 21, 202612 days).

Playing it safe? Spring frost holds off until about May 8, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Coulee Dam, WA

January

February

March

April

May

August

Understand your frost dates

Frost dates for ZIP 99116: NOAA 1991-2020 normals (USC00451767 COULEE DAM 1 SW, WA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.