Ursina, PA 15485 Frost Dates
Frost dates for Ursina, PA, ZIP 15485
Typically, the last spring freeze lands around 05/09, roughly 254 days out. The first fall frost typically arrives around 10/11, about 155 frost-free days later.
The USDA Plant Hardiness Zone Map puts Ursina in Zone 6a (-10 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
Zone 6a around Ursina 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
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ursina compares
Ursina's growing season runs about 155 days, ranking 34,149 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,843 of 2,088.
Learn more
the frost range explains how to read the range around Ursina's dates instead of trusting one, and local microclimates explains what one yard in Ursina can differ from the 15485 normal.