Tomball, TX 77379 Frost Dates
When can you plant in Tomball, TX?
Around 02/19 is the usual last spring frost, about 175 days away. The first fall frost typically arrives around 12/03, about 290 frost-free days later.
Tomball sits in USDA Zone 9b (25 to 30°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 14 weeks of growing season left in Tomball before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 02/19 isn't a guarantee
02/19 is the middle of 30 years of NOAA records, not a promise. Plant by 01/21 and you're betting against frost in roughly 9 years out of 10. 03/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tomball compares
About 290 days separate Tomball's last and first frost, putting it 4,497 of 40,283 ZIP codes nationally. Within TX, it ranks 638 of 2,558.
Learn more
zone vs. frost date covers why Zone 9b and Tomball's frost date answer different questions. the frost range covers how to read the range around Tomball's dates instead of trusting one.