Mill Hall, PA 17751 Frost Dates
Frost dates for Mill Hall, PA, ZIP 17751
Around 04/25 is the usual last spring frost, about 240 days away. The first fall frost typically arrives around 10/19, about 175 frost-free days later.
Mill Hall sits in USDA Zone 6b (-5 to 0°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 6b around Mill Hall has about 7 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 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mill Hall compares
At roughly 175 frost-free days, Mill Hall places 27,039 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,198 of 2,088.
Learn more
zone vs. frost date explains why Zone 6b and Mill Hall's frost date answer different questions, and the frost range explains how to read the range around Mill Hall's dates instead of trusting one.