32.2217°N/110.9265°W
When to plant in Tucson
Arizona, United States · Hot desert (Köppen BWh)
Last spring frost · safe
Mar 17
~10% frost risk · typical Feb 27
First fall frost · safe
Nov 13
~10% frost risk · typical Nov 27
Frost-free days
278
Feb 27 → Nov 27
Climate zone
Hot desert
Köppen BWh
83/100 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 — 278 DAYS
FEB 27
NOV 27
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 Tucson.