Bethany, PA 18449 Frost Dates
Frost dates for Bethany, PA, ZIP 18449
The last spring frost here typically falls around 05/14, about 259 days from today. The first fall frost typically arrives around 10/01, about 140 frost-free days later.
Bethany sits in USDA Zone 5b (-15 to -10°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
Zone 5b around Bethany has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Bethany's last frost
05/14 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bethany compares
Bethany's growing season runs about 140 days, ranking 37,162 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 2,030 of 2,088.
Learn more
the frost range explains how to read the range around Bethany's dates instead of trusting one, and local microclimates explains what one yard in Bethany can differ from the 18449 normal.