Pittsburgh, PA 15213 Frost Dates
Pittsburgh, PA: when does the frost end?
Typically, the last spring freeze lands around 04/18, roughly 233 days out. Fall's first freeze usually shows up around 10/28, roughly 193 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Pittsburgh 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 9 weeks until Pittsburgh's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Pittsburgh's last frost
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Pittsburgh against the rest of the dataset
About 193 days separate Pittsburgh's last and first frost, putting it 19,671 of 40,283 ZIP codes nationally. Within PA, it ranks 406 of 2,088.
Learn more
Before leaning on 15213's figures: zone vs. frost date explains why Zone 6b and Pittsburgh's frost date answer different questions, while the frost range explains how to read the range around Pittsburgh's dates instead of trusting one.