Ehrenfeld, PA 15942 Frost Dates
15942, near Ehrenfeld, 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 10/21, roughly 176 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Ehrenfeld in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Ehrenfeld'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
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Ehrenfeld against the rest of the dataset
Ehrenfeld's growing season runs about 176 days, ranking 26,646 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,098 of 2,088.
Learn more
Two guides worth reading on 15942: local microclimates, on what one yard in Ehrenfeld can differ from the 15942 normal, and zone vs. frost date, on why Zone 6a and Ehrenfeld's frost date answer different questions.