Carlisle, PA 17013 Frost Dates
Frost dates for Carlisle, PA, ZIP 17013
The last spring frost here typically falls around 04/09, about 224 days from today. The first fall frost typically arrives around 11/01, about 205 frost-free days later.
The USDA Plant Hardiness Zone Map puts Carlisle in Zone 7a (0 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 7a around Carlisle has about 9 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 04/09 isn't a guarantee
04/09 is the middle of 30 years of NOAA records, not a promise. Plant by 03/27 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Carlisle compares
At roughly 205 frost-free days, Carlisle places 16,186 of 40,283 ZIP codes in this dataset. Within PA, it ranks 126 of 2,088.
Learn more
zone vs. frost date explains why Zone 7a and Carlisle's frost date answer different questions, and the frost range explains how to read the range around Carlisle's dates instead of trusting one.