Green Hills, PA 15329 Frost Dates
15329, near Green Hills, PA: the frost window
Around 05/03 is the usual last spring frost, about 248 days away. Fall's first freeze usually shows up around 10/15, roughly 164 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 Green Hills, not a forecast for this year.
Stretching the season past the first frost
Green Hills'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.
Why 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Green Hills against the rest of the dataset
Green Hills's growing season runs about 164 days, ranking 31,274 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,647 of 2,088.
Learn more
Two guides worth reading on 15329: the frost range, on how to read the range around Green Hills's dates instead of trusting one, and local microclimates, on what one yard in Green Hills can differ from the 15329 normal.