Kistler, PA 17066 Frost Dates
Kistler, PA: when does the frost end?
Typically, the last spring freeze lands around 04/21, roughly 236 days out. Fall's first freeze usually shows up around 10/24, roughly 185 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Kistler 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 Kistler's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Kistler against the rest of the dataset
At roughly 185 frost-free days, Kistler places 23,320 of 40,283 ZIP codes in this dataset. Within PA, it ranks 734 of 2,088.
Learn more
Before leaning on 17066's figures: local microclimates explains what one yard in Kistler can differ from the 17066 normal, while zone vs. frost date explains why Zone 7a and Kistler's frost date answer different questions.