Milesburg, PA 16853 Frost Dates
Frost dates for Milesburg, PA, ZIP 16853
Typically, the last spring freeze lands around 04/20, roughly 235 days out. The first fall frost typically arrives around 10/26, about 187 frost-free days later.
The USDA Plant Hardiness Zone Map puts Milesburg in Zone 6b (-5 to 0°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 6b around Milesburg has about 8 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.
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 Milesburg compares
Milesburg's growing season runs about 187 days, ranking 22,494 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 615 of 2,088.
Learn more
zone vs. frost date explains why Zone 6b and Milesburg's frost date answer different questions, and the frost range explains how to read the range around Milesburg's dates instead of trusting one.