47.6597°N/117.4291°W
When to plant in Spokane
Washington, United States · Continental, dry warm summer (Köppen Dsb)
Last spring frost · safe
May 12
~10% frost risk · typical Apr 30
First fall frost · safe
Sep 23
~10% frost risk · typical Oct 9
Frost-free days
162
Apr 30 → Oct 9
Climate zone
Continental, dry warm summer
Köppen Dsb
86/100 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 — 162 DAYS
APR 30
OCT 9
Full crop calendar
Same climate — Continental, dry warm summer
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 Spokane.