Mahanoy City, PA 18248 Frost Dates
18248, near Mahanoy City, PA: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/22, roughly 175 days after the last spring frost.
Mahanoy City 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
Mahanoy City'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.
Mahanoy City against the rest of the dataset
About 175 days separate Mahanoy City's last and first frost, putting it 26,913 of 40,283 ZIP codes nationally. Within PA, it ranks 1,147 of 2,088.
Learn more
Two guides worth reading on 18248: the frost range, on how to read the range around Mahanoy City's dates instead of trusting one, and local microclimates, on what one yard in Mahanoy City can differ from the 18248 normal.