Lewis Run, PA 16738 Frost Dates
When can you plant in Lewis Run, PA?
The last spring frost here typically falls around 05/18, about 263 days from today. 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
About 5 weeks of growing season left in Lewis Run before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/18 isn't a guarantee
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 37,756 of 40,283 ZIP codes nationally. Within PA, it ranks 2,060 of 2,088.
Learn more
zone vs. frost date covers why Zone 5b and Lewis Run's frost date answer different questions. the frost range covers how to read the range around Lewis Run's dates instead of trusting one.