Riegelsville, PA 18077 Frost Dates
18077, near Riegelsville, PA: the frost window
Around 04/29 is the usual last spring frost, about 244 days away. Fall's first freeze usually shows up around 10/16, roughly 170 days after the last spring frost.
Riegelsville sits in USDA Zone 7a (0 to 5°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
Riegelsville'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 04/29 isn't a guarantee
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Riegelsville against the rest of the dataset
About 170 days separate Riegelsville's last and first frost, putting it 29,137 of 40,283 ZIP codes nationally. Within PA, it ranks 1,495 of 2,088.
Learn more
Two guides worth reading on 18077: the frost range, on how to read the range around Riegelsville's dates instead of trusting one, and local microclimates, on what one yard in Riegelsville can differ from the 18077 normal.