Orwigsburg, PA 17961 Frost Dates
When can you plant in Orwigsburg, PA?
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/22, about 175 frost-free days later.
Orwigsburg sits in USDA Zone 7a (0 to 5°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 Orwigsburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/30 isn't a guarantee
04/30 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. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Orwigsburg compares
About 175 days separate Orwigsburg's last and first frost, putting it 26,939 of 40,283 ZIP codes nationally. Within PA, it ranks 1,163 of 2,088.
Learn more
zone vs. frost date covers why Zone 7a and Orwigsburg's frost date answer different questions. the frost range covers how to read the range around Orwigsburg's dates instead of trusting one.