Lansdale, PA 19443 Frost Dates
Frost dates for Lansdale, PA, ZIP 19443
The last spring frost here typically falls around 04/24, about 239 days from today. The first fall frost typically arrives around 10/15, about 173 frost-free days later.
Lansdale sits in USDA Zone 7a (0 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 7a around Lansdale has about 7 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
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lansdale compares
Lansdale's growing season runs about 173 days, ranking 27,801 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,314 of 2,088.
Learn more
zone vs. frost date explains why Zone 7a and Lansdale's frost date answer different questions, and the frost range explains how to read the range around Lansdale's dates instead of trusting one.