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Frost dates for Saint Louis, Missouri

In a typical year, Saint Louis’s last spring frost lands around Apr 1 and the first fall frost around Nov 4, a growing season of about 217 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 7a.

Last spring frost and first fall frost odds for Saint Louis, Missouri
OddsLast spring frostFirst fall frost
10 percentMar 14Oct 24
50 percentApr 1Nov 4
90 percentApr 18Nov 21

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 Saint Louis is typically around 78°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.

Plantable now in Saint Louis

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

See the full what-to-plant lookup

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