Lewis Run, PA 16732 Frost Dates
Frost dates for Lewis Run, PA, ZIP 16732
Around 05/18 is the usual last spring frost, about 263 days away. The first fall frost typically arrives around 10/01, about 136 frost-free days later.
Lewis Run 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 Lewis Run 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.
How much risk comes with planting early here
05/18 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. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lewis Run compares
About 136 days separate Lewis Run's last and first frost, putting it 37,755 of 40,283 ZIP codes nationally. Within PA, it ranks 2,059 of 2,088.
Learn more
the frost range explains how to read the range around Lewis Run's dates instead of trusting one, and local microclimates explains what one yard in Lewis Run can differ from the 16732 normal.