Scranton, PA 18577 Frost Dates
Scranton, PA: when does the frost end?
Around 04/23 is the usual last spring frost, about 238 days away. Fall's first freeze usually shows up around 10/20, roughly 178 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 Scranton, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Scranton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Scranton's last frost
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Scranton against the rest of the dataset
About 178 days separate Scranton's last and first frost, putting it 25,565 of 40,283 ZIP codes nationally. Within PA, it ranks 876 of 2,088.
Learn more
Before leaning on 18577's figures: zone vs. frost date explains why Zone 6b and Scranton's frost date answer different questions, while the frost range explains how to read the range around Scranton's dates instead of trusting one.