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Planting calendar for ZIP 82718 (Gillette, WY)

When to plant vegetables in Gillette, WY (USDA hardiness zone 5a). Typical last spring frost around May 25, 2026 10 days year to year), first fall frost around Sep 23, 202611 days).

Playing it safe? Spring frost holds off until about Jun 6, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Gillette, WY

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 82718: NOAA 1991-2020 normals (USC00489805 WRIGHT 12W, WY US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.