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Planting calendar for ZIP 53098 (Watertown, WI)

When to plant vegetables in Watertown, WI (USDA hardiness zone 5a). Typical last spring frost around Apr 28, 2026 11 days year to year), first fall frost around Oct 12, 202611 days).

Playing it safe? Spring frost holds off until about May 12, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Watertown, WI planting calendar for dates typical of the whole city.

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Month by month in Watertown, WI

January

February

March

April

May

July

August

Understand your frost dates

Frost dates for ZIP 53098: NOAA 1991-2020 normals (USC00478919 WATERTOWN WWTP, WI US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.