Last frost date in Aberdeen, South Dakota

May 8

Average last frost in spring. In an early year (1 in 10) it's over by April 25; in a late year (1 in 10) it comes after May 21.

September 29

Average first frost in fall. 1 year in 10 it comes by September 17.

Source: NOAA U.S. Climate Normals 1991–2020, station Aberdeen 3 E (USC00390022), 2.7 miles from Aberdeen, elevation 1,301 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.

What to plant now

Frost dates for Aberdeen, South Dakota
Early yearAverageLate year
Last frost in springApr 25May 8May 21
First frost in fallSept 17Sept 29Oct 11

An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.

Frost-free days in an average year: 144

Planting calendar for Aberdeen

Fall planting

USDA dates for places whose average first freeze is about September 30 (Aberdeen: September 29).

USDA lists chervil and chives, garlic, horseradish, leeks, onion plants, onion seed, onion sets, shallots as generally spring-planted here.

Spring planting

USDA dates for places whose average last freeze is about May 10 (Aberdeen: May 8).

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.

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