Callensburg, PA 16213 Frost Dates
Frost dates for Callensburg, PA, ZIP 16213
The last spring frost here typically falls around 05/10, about 255 days from today. The first fall frost typically arrives around 10/12, about 155 frost-free days later.
The USDA Plant Hardiness Zone Map puts Callensburg 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 Callensburg 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.
Why 05/10 isn't a guarantee
05/10 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Callensburg compares
About 155 days separate Callensburg's last and first frost, putting it 34,172 of 40,283 ZIP codes nationally. Within PA, it ranks 1,851 of 2,088.
Learn more
zone vs. frost date explains why Zone 6a and Callensburg's frost date answer different questions, and the frost range explains how to read the range around Callensburg's dates instead of trusting one.