Frost dates for Calgary
◇ Station-measured · 82/100 confidence
Last spring frost (50%)
May 23
10% risk to Jun 10
First fall frost (50%)
Sep 15
10% risk from Aug 29
Frost-free days
115
May 23 → Sep 15
Climate zone
Subarctic
Köppen Dfc
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
FROST
GROWING SEASON — 115 DAYS
MAY 23
SEP 15