Brentwood, PA 15227 Frost Dates
When can you plant in Brentwood, PA?
The last spring frost here typically falls around 04/18, about 233 days from today. The first fall frost typically arrives around 10/28, about 193 frost-free days later.
Brentwood 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 9 weeks of growing season left in Brentwood before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/18 isn't a guarantee
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brentwood compares
Brentwood's growing season runs about 193 days, ranking 19,778 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 416 of 2,088.
Learn more
the frost range covers how to read the range around Brentwood's dates instead of trusting one. local microclimates covers what one yard in Brentwood can differ from the 15227 normal.