Frost dates for Seattle

◇ Station-based · 83/100 confidence

Last spring frost · safe

Apr 13

~10% frost risk · typical Mar 17

First fall frost · safe

Oct 30

~10% frost risk · typical Nov 13

Frost-free days

237

Mar 17 → Nov 13

Climate zone

Mediterranean, warm summer

Köppen Csb

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 — 237 DAYS

MAR 17

NOV 13