Clairton, PA 15025 Frost Dates
When can you plant in Clairton, PA?
Typically, the last spring freeze lands around 05/02, roughly 247 days out. The first fall frost typically arrives around 10/20, about 170 frost-free days later.
Clairton 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.
What to do before the first frost
About 8 weeks of growing season left in Clairton before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/02 isn't a guarantee
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Clairton compares
At roughly 170 frost-free days, Clairton places 28,968 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,462 of 2,088.
Learn more
the frost range covers how to read the range around Clairton's dates instead of trusting one. local microclimates covers what one yard in Clairton can differ from the 15025 normal.