Southmont, PA 15905 Frost Dates
Frost dates for Southmont, PA, ZIP 15905
The last spring frost here typically falls around 04/29, about 244 days from today. The first fall frost typically arrives around 10/21, about 176 frost-free days later.
Southmont 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 Southmont has about 8 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
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/14 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Southmont compares
Southmont's growing season runs about 176 days, ranking 26,490 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,050 of 2,088.
Learn more
the frost range explains how to read the range around Southmont's dates instead of trusting one, and local microclimates explains what one yard in Southmont can differ from the 15905 normal.