Jeannette, PA 15664 Frost Dates
15664, near Jeannette, PA: the frost window
Around 05/01 is the usual last spring frost, about 246 days away. Fall's first freeze usually shows up around 10/13, roughly 164 days after the last spring frost.
Zone 6b (-5 to 0°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 Jeannette, not a forecast for this year.
Stretching the season past the first frost
Jeannette'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.
Jeannette against the rest of the dataset
About 164 days separate Jeannette's last and first frost, putting it 30,890 of 40,283 ZIP codes nationally. Within PA, it ranks 1,561 of 2,088.
Learn more
Two guides worth reading on 15664: local microclimates, on what one yard in Jeannette can differ from the 15664 normal, and zone vs. frost date, on why Zone 6b and Jeannette's frost date answer different questions.