Portia, AR 72457 Frost Dates
72457, near Portia, AR: the frost window
Around 03/27 is the usual last spring frost, about 211 days away. Fall's first freeze usually shows up around 11/05, roughly 224 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Portia in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Portia's growing season runs out in roughly 10 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 Portia's last frost
03/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/10 and only about 1 year in 10 sees frost after that.
Portia against the rest of the dataset
About 224 days separate Portia's last and first frost, putting it 11,943 of 40,283 ZIP codes nationally. Within AR, it ranks 351 of 687.
Learn more
Two guides worth reading on 72457: local microclimates, on what one yard in Portia can differ from the 72457 normal, and zone vs. frost date, on why Zone 7b and Portia's frost date answer different questions.