Mont Alto, PA 17222 Frost Dates
When can you plant in Mont Alto, PA?
Typically, the last spring freeze lands around 04/15, roughly 230 days out. The first fall frost typically arrives around 10/27, about 194 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mont Alto in Zone 7a (0 to 5°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
About 9 weeks of growing season left in Mont Alto before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/15 isn't a guarantee
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 05/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mont Alto compares
At roughly 194 frost-free days, Mont Alto places 19,515 of 40,283 ZIP codes in this dataset. Within PA, it ranks 384 of 2,088.
Learn more
the frost range covers how to read the range around Mont Alto's dates instead of trusting one. local microclimates covers what one yard in Mont Alto can differ from the 17222 normal.