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Frost dates for Yankton, South Dakota

In a typical year, Yankton’s last spring frost lands around Apr 27 and the first fall frost around Oct 11, a growing season of about 167 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 5a.

Right now the typical frost season has arrived; planting waits for spring.

Last spring frost and first fall frost odds for Yankton, South Dakota
OddsLast spring frostFirst fall frost
10 percentApr 13Sep 27
50 percentApr 27Oct 11
90 percentMay 10Oct 23

A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.

Soil in Yankton is typically around 49°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.

Plantable now in Yankton

Timing comes from the same temperature engine the app uses, run against Yankton’s normals for today.

See the full what-to-plant lookup

Common questions

When is the last frost in Yankton, South Dakota?

Yankton’s last spring frost falls around April 27 in a typical year. One year in ten it is done by April 13, and one year in ten frost holds on until May 10. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Yankton?

The first fall frost arrives around October 11 in a typical year, as early as September 27 in an early year and as late as October 23 in a late one.

How long is the growing season in Yankton?

About 167 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Yankton in?

Yankton is in USDA hardiness zone 5a under the 2023 USDA Plant Hardiness Zone Map.

Dates come from 30-year NOAA climate normals for the nearest reporting station. They describe odds, not a forecast.

Nearby cities

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