Manheim, PA 17545 Frost Dates
Frost dates for Manheim, PA, ZIP 17545
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/10, about 162 frost-free days later.
Manheim 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 Manheim 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
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Manheim compares
Manheim's growing season runs about 162 days, ranking 31,714 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,656 of 2,088.
Learn more
zone vs. frost date explains why Zone 7a and Manheim's frost date answer different questions, and the frost range explains how to read the range around Manheim's dates instead of trusting one.