Ligonier, PA 15658 Frost Dates
15658, near Ligonier, PA: the frost window
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/13, roughly 164 days after the last spring frost.
Ligonier sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Ligonier's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Ligonier against the rest of the dataset
About 164 days separate Ligonier's last and first frost, putting it 31,020 of 40,283 ZIP codes nationally. Within PA, it ranks 1,589 of 2,088.
Learn more
Two guides worth reading on 15658: local microclimates, on what one yard in Ligonier can differ from the 15658 normal, and zone vs. frost date, on why Zone 6a and Ligonier's frost date answer different questions.