Frost dates for St. Louis

◇ Station-based · 84/100 confidence

Last spring frost · safe

Apr 10

~10% frost risk · typical Mar 30

First fall frost · safe

Oct 26

~10% frost risk · typical Nov 5

Frost-free days

218

Mar 30 → Nov 5

Climate zone

Humid subtropical

Köppen Cfa

The growing year

Frost-bounded season with crops mapped onto the 12-month axis.

Frost risk Growing Harvest

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

FROST

GROWING SEASON — 218 DAYS

MAR 30

NOV 5