Frost dates for Aurora

◇ Station-based · 89/100 confidence

Last spring frost · safe

May 21

~10% frost risk · typical May 5

First fall frost · safe

Sep 19

~10% frost risk · typical Oct 8

Frost-free days

152

May 5 → Oct 8

Climate zone

Cold semi-arid

Köppen BSk

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 — 152 DAYS

MAY 5

OCT 8