44.5192°N/88.0198°W
When to plant in Green Bay
Wisconsin, United States · Continental, warm summer (Köppen Dfb)
Last spring frost · safe
May 16
~10% frost risk · typical May 4
First fall frost · safe
Sep 21
~10% frost risk · typical Oct 5
Frost-free days
152
May 4 → Oct 5
Climate zone
Continental, warm summer
Köppen Dfb
88/100 confidence
◇ Station-based
The frost date shown is the safe date (~10% frost risk); the typical median is shown alongside. Your microclimate can shift things ±1–2 weeks.
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 — 152 DAYS
MAY 4
OCT 5
Full crop calendar
Source: Curated · based on NOAA GHCN-Daily 1991–2020 normal · Köppen–Geiger classification (Beck et al. 2023) · crop windows from FAO ECOCROP references. How we calculate this →
Also see frost dates for Green Bay.