Frost dates for Chicago

◇ Station-based · 84/100 confidence

Last spring frost · safe

Apr 18

~10% frost risk · typical Apr 10

First fall frost · safe

Oct 9

~10% frost risk · typical Oct 31

Frost-free days

206

Apr 10 → Oct 31

Climate zone

Continental, hot summer

Köppen Dfa

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 — 206 DAYS

APR 10

OCT 31