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Planting calendar for ZIP 82310 (Jeffrey City, WY)

When to plant vegetables in Jeffrey City, WY (USDA hardiness zone 4b). Typical last spring frost around Jun 1, 2026 12 days year to year), first fall frost around Sep 13, 202611 days).

Playing it safe? Spring frost holds off until about Jun 16, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Jeffrey City, WY

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 82310: NOAA 1991-2020 normals (USC00484925 JEFFREY CITY, WY US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.