Frost dates for Spokane

◇ Station-based · 86/100 confidence

Last spring frost · safe

May 12

~10% frost risk · typical Apr 30

First fall frost · safe

Sep 23

~10% frost risk · typical Oct 9

Frost-free days

162

Apr 30 → Oct 9

Climate zone

Continental, dry warm summer

Köppen Dsb

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 — 162 DAYS

APR 30

OCT 9