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Planting calendar for ZIP 61239 (Carbon Cliff, IL)

When to plant vegetables in Carbon Cliff, IL (USDA hardiness zone 5b). Typical last spring frost around Apr 16, 2026 11 days year to year), first fall frost around Oct 25, 202610 days).

Playing it safe? Spring frost holds off until about Apr 30, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Carbon Cliff, IL planting calendar for dates typical of the whole city.

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Month by month in Carbon Cliff, IL

January

February

March

April

May

August

September

Understand your frost dates

Frost dates for ZIP 61239: NOAA 1991-2020 normals (USC00134705 LE CLAIRE L&D 14, IA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.