Mount Wolf, PA 17347 Frost Dates
17347, near Mount Wolf, PA: the frost window
Around 04/09 is the usual last spring frost, about 224 days away. Fall's first freeze usually shows up around 11/02, roughly 206 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mount Wolf in Zone 7a (0 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
Mount Wolf's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Mount Wolf's last frost
04/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/25 and only about 1 year in 10 sees frost after that.
Mount Wolf against the rest of the dataset
About 206 days separate Mount Wolf's last and first frost, putting it 16,048 of 40,283 ZIP codes nationally. Within PA, it ranks 108 of 2,088.
Learn more
Two guides worth reading on 17347: zone vs. frost date, on why Zone 7a and Mount Wolf's frost date answer different questions, and the frost range, on how to read the range around Mount Wolf's dates instead of trusting one.