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Planting calendar for ZIP 80430 (Coalmont, CO)

When to plant vegetables in Coalmont, CO (USDA hardiness zone 4b). Typical last spring frost around Jun 9, 2026 12 days year to year), first fall frost around Sep 12, 20269 days).

Playing it safe? Spring frost holds off until about Jun 24, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Coalmont, CO planting calendar for dates typical of the whole city.

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Month by month in Coalmont, CO

March

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May

June

July

Understand your frost dates

Frost dates for ZIP 80430: NOAA 1991-2020 normals (USC00057936 STEAMBOAT SPRINGS, CO US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.