Summerhill, PA 15958 Frost Dates
Summerhill, PA: when does the frost end?
Around 04/29 is the usual last spring frost, about 244 days away. Fall's first freeze usually shows up around 10/21, roughly 176 days after the last spring frost.
Zone 6a (-10 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 Summerhill, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Summerhill'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
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Summerhill against the rest of the dataset
At roughly 176 frost-free days, Summerhill places 26,603 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,087 of 2,088.
Learn more
Before leaning on 15958's figures: zone vs. frost date explains why Zone 6a and Summerhill's frost date answer different questions, while the frost range explains how to read the range around Summerhill's dates instead of trusting one.