Mifflintown, PA 17059 Frost Dates
When can you plant in Mifflintown, PA?
Around 04/21 is the usual last spring frost, about 236 days away. The first fall frost typically arrives around 10/24, about 185 frost-free days later.
Mifflintown sits in USDA Zone 7a (0 to 5°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 8 weeks of growing season left in Mifflintown before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Mifflintown's last frost
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mifflintown compares
At roughly 185 frost-free days, Mifflintown places 23,248 of 40,283 ZIP codes in this dataset. Within PA, it ranks 718 of 2,088.
Learn more
the frost range covers how to read the range around Mifflintown's dates instead of trusting one. local microclimates covers what one yard in Mifflintown can differ from the 17059 normal.