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Planting calendar for ZIP 59802 (Missoula, MT)

When to plant vegetables in Missoula, MT (USDA hardiness zone 5b). Typical last spring frost around May 10, 2026 12 days year to year), first fall frost around Oct 1, 202611 days).

Playing it safe? Spring frost holds off until about May 25, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Missoula, MT

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April

May

June

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August

Understand your frost dates

Frost dates for ZIP 59802: NOAA 1991-2020 normals (USC00245735 MISSOULA 2 NE, MT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.