Portersville, PA 16051 Frost Dates
Portersville, PA: when does the frost end?
Typically, the last spring freeze lands around 05/15, roughly 260 days out. Fall's first freeze usually shows up around 10/03, roughly 140 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Portersville 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
With roughly 5 weeks until Portersville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Portersville's last frost
05/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Portersville against the rest of the dataset
At roughly 140 frost-free days, Portersville places 37,166 of 40,283 ZIP codes in this dataset. Within PA, it ranks 2,033 of 2,088.
Learn more
Before leaning on 16051's figures: zone vs. frost date explains why Zone 6a and Portersville's frost date answer different questions, while the frost range explains how to read the range around Portersville's dates instead of trusting one.