Dunbar, PA 15467 Frost Dates
When can you plant in Dunbar, PA?
Typically, the last spring freeze lands around 04/28, roughly 243 days out. The first fall frost typically arrives around 10/21, about 175 frost-free days later.
Dunbar 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 Dunbar before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/28 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dunbar compares
At roughly 175 frost-free days, Dunbar places 27,089 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,220 of 2,088.
Learn more
local microclimates covers what one yard in Dunbar can differ from the 15467 normal. zone vs. frost date covers why Zone 6b and Dunbar's frost date answer different questions.