Petersburg, PA 16669 Frost Dates
When can you plant in Petersburg, PA?
The last spring frost here typically falls around 04/20, about 235 days from today. The first fall frost typically arrives around 10/26, about 187 frost-free days later.
Petersburg 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 Petersburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 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 Petersburg compares
About 187 days separate Petersburg's last and first frost, putting it 22,575 of 40,283 ZIP codes nationally. Within PA, it ranks 622 of 2,088.
Learn more
the frost range covers how to read the range around Petersburg's dates instead of trusting one. local microclimates covers what one yard in Petersburg can differ from the 16669 normal.