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Planting calendar for ZIP 82901 (Rock Springs, WY)

When to plant vegetables in Rock Springs, WY (USDA hardiness zone 5b). Typical last spring frost around May 24, 2026 13 days year to year), first fall frost around Sep 24, 202610 days).

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

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

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Month by month in Rock Springs, WY

February

March

April

May

June

July

August

Understand your frost dates

Frost dates for ZIP 82901: NOAA 1991-2020 normals (USC00487847 ROCK SPRINGS FIRE DEPT, WY US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.