Frost dates for Tulsa

◇ Station-based · 88/100 confidence

Last spring frost · safe

Apr 15

~10% frost risk · typical Mar 31

First fall frost · safe

Oct 22

~10% frost risk · typical Nov 3

Frost-free days

214

Mar 31 → Nov 3

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 — 214 DAYS

MAR 31

NOV 3