Plum, PA 15239 Frost Dates
Plum, PA: when does the frost end?
Typically, the last spring freeze lands around 04/16, roughly 231 days out. Fall's first freeze usually shows up around 11/02, roughly 199 days after the last spring frost.
Plum sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 9 weeks until Plum's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Plum against the rest of the dataset
Plum's growing season runs about 199 days, ranking 18,028 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 281 of 2,088.
Learn more
Before leaning on 15239's figures: local microclimates explains what one yard in Plum can differ from the 15239 normal, while zone vs. frost date explains why Zone 6b and Plum's frost date answer different questions.