Glen Rock, PA 17332 Frost Dates
Glen Rock, PA: when does the frost end?
Typically, the last spring freeze lands around 04/19, roughly 234 days out. Fall's first freeze usually shows up around 10/25, roughly 188 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Glen Rock 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
With roughly 8 weeks until Glen Rock's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
Glen Rock against the rest of the dataset
At roughly 188 frost-free days, Glen Rock places 22,076 of 40,283 ZIP codes in this dataset. Within PA, it ranks 589 of 2,088.
Learn more
Before leaning on 17332's figures: zone vs. frost date explains why Zone 7a and Glen Rock's frost date answer different questions, while the frost range explains how to read the range around Glen Rock's dates instead of trusting one.