Portland, TX 78419 Frost Dates
Portland, TX: when does the frost end?
The last spring frost here typically falls around 01/15, about 140 days from today. Fall's first freeze usually shows up around 12/30, roughly 353 days after the last spring frost.
Zone 10a (30 to 35°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 Portland, not a forecast for this year.
Stretching the season past the first frost
With roughly 18 weeks until Portland's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
01/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/11 and only about 1 year in 10 sees frost after that.
Portland against the rest of the dataset
Portland's growing season runs about 353 days, ranking 2,233 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 73 of 2,558.
Learn more
Before leaning on 78419's figures: the frost range explains how to read the range around Portland's dates instead of trusting one, while local microclimates explains what one yard in Portland can differ from the 78419 normal.