Seward, PA 15954 Frost Dates
Seward, PA: when does the frost end?
Typically, the last spring freeze lands around 04/29, roughly 244 days out. Fall's first freeze usually shows up around 10/21, roughly 176 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Seward in Zone 6b (-5 to 0°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 8 weeks until Seward'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.
Seward against the rest of the dataset
At roughly 176 frost-free days, Seward places 26,617 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,092 of 2,088.
Learn more
Before leaning on 15954's figures: zone vs. frost date explains why Zone 6b and Seward's frost date answer different questions, while the frost range explains how to read the range around Seward's dates instead of trusting one.