Conyngham, PA 18256 Frost Dates
18256, near Conyngham, PA: the frost window
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/22, roughly 175 days after the last spring frost.
Conyngham sits in USDA Zone 6b (-5 to 0°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
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.
Why 04/30 isn't a guarantee
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
About 175 days separate Conyngham's last and first frost, putting it 26,999 of 40,283 ZIP codes nationally. Within PA, it ranks 1,187 of 2,088.
Learn more
Two guides worth reading on 18256: zone vs. frost date, on why Zone 6b and Conyngham's frost date answer different questions, and the frost range, on how to read the range around Conyngham's dates instead of trusting one.