Smithton, PA 15448 Frost Dates
Smithton, PA: when does the frost end?
Around 05/01 is the usual last spring frost, about 246 days away. Fall's first freeze usually shows up around 10/13, roughly 164 days after the last spring frost.
Zone 6b (-5 to 0°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 Smithton, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Smithton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Smithton's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Smithton against the rest of the dataset
At roughly 164 frost-free days, Smithton places 31,166 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,619 of 2,088.
Learn more
Before leaning on 15448's figures: zone vs. frost date explains why Zone 6b and Smithton's frost date answer different questions, while the frost range explains how to read the range around Smithton's dates instead of trusting one.