South Houston, TX 77502 Frost Dates
77502, near South Houston, TX: the frost window
The last spring frost here typically falls around 01/30, about 155 days from today. Fall's first freeze usually shows up around 12/28, roughly 330 days after the last spring frost.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for South Houston, not a forecast for this year.
Stretching the season past the first frost
South Houston's growing season runs out in roughly 17 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around South Houston's last frost
01/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/29 and only about 1 year in 10 sees frost after that.
South Houston against the rest of the dataset
At roughly 330 frost-free days, South Houston places 3,020 of 40,283 ZIP codes in this dataset. Within TX, it ranks 159 of 2,558.
Learn more
Two guides worth reading on 77502: local microclimates, on what one yard in South Houston can differ from the 77502 normal, and zone vs. frost date, on why Zone 9b and South Houston's frost date answer different questions.