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Planting calendar for ZIP 59089 (Wyola, MT)

When to plant vegetables in Wyola, MT (USDA hardiness zone 4b). Typical last spring frost around May 21, 2026 9 days year to year), first fall frost around Sep 17, 202610 days).

Playing it safe? Spring frost holds off until about Jun 1, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Wyola, MT planting calendar for dates typical of the whole city.

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Month by month in Wyola, MT

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 59089: NOAA 1991-2020 normals (USC00249175 WYOLA 1 SW, MT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.