Portland, TX 78469 Frost Dates
When can you plant in Portland, TX?
Typically, the last spring freeze lands around 01/28, roughly 153 days out. The first fall frost typically arrives around 12/21, about 331 frost-free days later.
The USDA Plant Hardiness Zone Map puts Portland in Zone 10a (30 to 35°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 16 weeks of growing season left in Portland before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
01/28 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 12/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Portland compares
At roughly 331 frost-free days, Portland places 2,943 of 40,283 ZIP codes in this dataset. Within TX, it ranks 129 of 2,558.
Learn more
the frost range covers how to read the range around Portland's dates instead of trusting one. local microclimates covers what one yard in Portland can differ from the 78469 normal.