Harmony, PA 16037 Frost Dates
Frost dates for Harmony, PA, ZIP 16037
Typically, the last spring freeze lands around 04/28, roughly 243 days out. The first fall frost typically arrives around 10/18, about 172 frost-free days later.
Harmony 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 Harmony 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.
The actual range around Harmony's last frost
04/28 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Harmony compares
At roughly 172 frost-free days, Harmony places 28,409 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,392 of 2,088.
Learn more
the frost range explains how to read the range around Harmony's dates instead of trusting one, and local microclimates explains what one yard in Harmony can differ from the 16037 normal.