Hawthorn, PA 16240 Frost Dates
16240, near Hawthorn, PA: the frost window
Typically, the last spring freeze lands around 05/10, roughly 255 days out. Fall's first freeze usually shows up around 10/12, roughly 155 days after the last spring frost.
Zone 6a (-10 to -5°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 Hawthorn, not a forecast for this year.
Stretching the season past the first frost
Hawthorn's growing season runs out in roughly 6 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 Hawthorn's last frost
05/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Hawthorn against the rest of the dataset
About 155 days separate Hawthorn's last and first frost, putting it 34,087 of 40,283 ZIP codes nationally. Within PA, it ranks 1,817 of 2,088.
Learn more
Two guides worth reading on 16240: zone vs. frost date, on why Zone 6a and Hawthorn's frost date answer different questions, and the frost range, on how to read the range around Hawthorn's dates instead of trusting one.