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Frost dates for Des Moines, Iowa

In a typical year, Des Moines’s last spring frost lands around Apr 23 and the first fall frost around Oct 15, a growing season of about 175 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 5b.

Last spring frost and first fall frost odds for Des Moines, Iowa
OddsLast spring frostFirst fall frost
10 percentApr 8Sep 30
50 percentApr 23Oct 15
90 percentMay 6Oct 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 Des Moines is typically around 73°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.

Plantable now in Des Moines

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

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