Milford, PA 18458 Frost Dates
Frost dates for Milford, PA, ZIP 18458
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/10, about 158 frost-free days later.
Milford sits in USDA Zone 6a (-10 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
Zone 6a around Milford has about 6 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
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Milford compares
At roughly 158 frost-free days, Milford places 33,061 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,749 of 2,088.
Learn more
local microclimates explains what one yard in Milford can differ from the 18458 normal, and zone vs. frost date explains why Zone 6a and Milford's frost date answer different questions.