Prospect, PA 16052 Frost Dates
Prospect, 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.
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 Prospect, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Prospect's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Prospect'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.
Prospect against the rest of the dataset
About 140 days separate Prospect's last and first frost, putting it 37,077 of 40,283 ZIP codes nationally. Within PA, it ranks 1,993 of 2,088.
Learn more
Before leaning on 16052's figures: zone vs. frost date explains why Zone 6a and Prospect's frost date answer different questions, while the frost range explains how to read the range around Prospect's dates instead of trusting one.