Dormont, PA 15216 Frost Dates
15216, near Dormont, PA: the frost window
Around 04/18 is the usual last spring frost, about 233 days away. Fall's first freeze usually shows up around 10/28, roughly 193 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Dormont in Zone 6b (-5 to 0°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
Dormont's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/18 isn't a guarantee
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Dormont against the rest of the dataset
At roughly 193 frost-free days, Dormont places 19,827 of 40,283 ZIP codes in this dataset. Within PA, it ranks 422 of 2,088.
Learn more
Two guides worth reading on 15216: the frost range, on how to read the range around Dormont's dates instead of trusting one, and local microclimates, on what one yard in Dormont can differ from the 15216 normal.