Tarentum, PA 15084 Frost Dates
15084, near Tarentum, PA: the frost window
Typically, the last spring freeze lands around 04/16, roughly 231 days out. Fall's first freeze usually shows up around 11/02, roughly 199 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Tarentum 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
Tarentum'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.
The actual range around Tarentum's last frost
04/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Tarentum against the rest of the dataset
About 199 days separate Tarentum's last and first frost, putting it 18,106 of 40,283 ZIP codes nationally. Within PA, it ranks 298 of 2,088.
Learn more
Two guides worth reading on 15084: local microclimates, on what one yard in Tarentum can differ from the 15084 normal, and zone vs. frost date, on why Zone 6b and Tarentum's frost date answer different questions.