Birdsboro, PA 19508 Frost Dates
Frost dates for Birdsboro, PA, ZIP 19508
The last spring frost here typically falls around 04/16, about 231 days from today. The first fall frost typically arrives around 10/27, about 193 frost-free days later.
The USDA Plant Hardiness Zone Map puts Birdsboro 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 Birdsboro 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 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/03 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Birdsboro compares
Birdsboro's growing season runs about 193 days, ranking 19,843 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 427 of 2,088.
Learn more
local microclimates explains what one yard in Birdsboro can differ from the 19508 normal, and zone vs. frost date explains why Zone 7a and Birdsboro's frost date answer different questions.