Mount Jewett, PA 16740 Frost Dates
Frost dates for Mount Jewett, PA, ZIP 16740
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.
The USDA Plant Hardiness Zone Map puts Mount Jewett in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5b around Mount Jewett 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 Mount Jewett compares
At roughly 136 frost-free days, Mount Jewett places 37,731 of 40,283 ZIP codes in this dataset. Within PA, it ranks 2,056 of 2,088.
Learn more
zone vs. frost date explains why Zone 5b and Mount Jewett's frost date answer different questions, and the frost range explains how to read the range around Mount Jewett's dates instead of trusting one.