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Frost dates for Sioux Falls, South Dakota

In a typical year, Sioux Falls’s last spring frost lands around Apr 26 and the first fall frost around Oct 13, a growing season of about 170 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 5a.

Last spring frost and first fall frost odds for Sioux Falls, South Dakota
OddsLast spring frostFirst fall frost
10 percentApr 10Sep 28
50 percentApr 26Oct 13
90 percentMay 9Oct 28

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 Sioux Falls is typically around 72°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.

Plantable now in Sioux Falls

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

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