Conyngham, PA 18249 Frost Dates
18249, near Conyngham, PA: the frost window
Typically, the last spring freeze lands around 04/30, roughly 245 days out. Fall's first freeze usually shows up around 10/22, roughly 175 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 Conyngham, not a forecast for this year.
Stretching the season past the first frost
Conyngham's growing season runs out in roughly 8 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
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Conyngham against the rest of the dataset
Conyngham's growing season runs about 175 days, ranking 26,997 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,185 of 2,088.
Learn more
Two guides worth reading on 18249: local microclimates, on what one yard in Conyngham can differ from the 18249 normal, and zone vs. frost date, on why Zone 6b and Conyngham's frost date answer different questions.