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Planting calendar for ZIP 98274 (Mount Vernon, WA)

When to plant vegetables in Mount Vernon, WA (USDA hardiness zone 8b). Typical last spring frost around Mar 24, 2026 16 days year to year), first fall frost around Nov 3, 202617 days).

Playing it safe? Spring frost holds off until about Apr 13, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Mount Vernon, WA

January

February

March

April

August

September

December

Understand your frost dates

Frost dates for ZIP 98274: NOAA 1991-2020 normals (USC00455678 MT VERNON 3 WNW, WA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.