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Planting calendar for ZIP 57345 (Highmore, SD)

When to plant vegetables in Highmore, SD (USDA hardiness zone 4b). Typical last spring frost around May 12, 2026 12 days year to year), first fall frost around Oct 1, 202611 days).

Playing it safe? Spring frost holds off until about May 27, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Highmore, SD planting calendar for dates typical of the whole city.

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Month by month in Highmore, SD

February

March

April

May

June

July

August

Understand your frost dates

Frost dates for ZIP 57345: NOAA 1991-2020 normals (USC00393832 HIGHMORE 1 W, SD US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.