Penbrook, PA 17112 Frost Dates
Penbrook, PA: when does the frost end?
Around 04/09 is the usual last spring frost, about 224 days away. Fall's first freeze usually shows up around 11/01, roughly 205 days after the last spring frost.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Penbrook, not a forecast for this year.
Stretching the season past the first frost
With roughly 9 weeks until Penbrook's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Penbrook's last frost
04/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 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.
Penbrook against the rest of the dataset
At roughly 205 frost-free days, Penbrook places 16,298 of 40,283 ZIP codes in this dataset. Within PA, it ranks 158 of 2,088.
Learn more
Before leaning on 17112's figures: the frost range explains how to read the range around Penbrook's dates instead of trusting one, while local microclimates explains what one yard in Penbrook can differ from the 17112 normal.