29.7633°N/95.3633°W
When to plant in Houston
Texas, United States · Humid subtropical (Köppen Cfa)
Last spring frost · safe
Mar 5
~10% frost risk · typical Jan 26
First fall frost · safe
Nov 25
~10% frost risk · typical Dec 9
Frost-free days
317
Jan 26 → Dec 9
Climate zone
Humid subtropical
Köppen Cfa
84/100 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
GROWING SEASON — 317 DAYS
JAN 26
DEC 9
Full crop calendar
Same climate — Humid subtropical
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 Houston.