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Planting calendar for ZIP 82831 (Arvada, WY)

When to plant vegetables in Arvada, WY (USDA hardiness zone 4b). Typical last spring frost around May 14, 2026 11 days year to year), first fall frost around Sep 30, 202610 days).

Playing it safe? Spring frost holds off until about May 28, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Arvada, WY planting calendar for dates typical of the whole city.

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Month by month in Arvada, WY

February

March

April

May

June

July

August

Understand your frost dates

Frost dates for ZIP 82831: NOAA 1991-2020 normals (USC00485506 LEITER 9N, WY US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.