Frost dates for Montreal
◇ Station-measured · 86/100 confidence
Last spring frost (50%)
May 11
10% risk to May 28
First fall frost (50%)
Sep 30
10% risk from Sep 13
Frost-free days
142
May 11 → Sep 30
Köppen
Dfb
Continental, warm summer
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 — 142 DAYS
MAY 11
SEP 30