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Planting calendar for ZIP 73942 (Guymon, OK)

When to plant vegetables in Guymon, OK (USDA hardiness zone 6b). Typical last spring frost around Apr 18, 2026 11 days year to year), first fall frost around Oct 23, 20269 days).

Playing it safe? Spring frost holds off until about May 2, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Guymon, OK planting calendar for dates typical of the whole city.

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Month by month in Guymon, OK

January

February

March

April

May

August

Understand your frost dates

Frost dates for ZIP 73942: NOAA 1991-2020 normals (USW00003030 GUYMON MUNI AP, OK US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.