Millersville, PA 17504 Frost Dates
When can you plant in Millersville, PA?
Around 04/18 is the usual last spring frost, about 233 days away. The first fall frost typically arrives around 10/25, about 186 frost-free days later.
The USDA Plant Hardiness Zone Map puts Millersville 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
About 8 weeks of growing season left in Millersville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/18 isn't a guarantee
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Millersville compares
About 186 days separate Millersville's last and first frost, putting it 22,755 of 40,283 ZIP codes nationally. Within PA, it ranks 644 of 2,088.
Learn more
zone vs. frost date covers why Zone 7a and Millersville's frost date answer different questions. the frost range covers how to read the range around Millersville's dates instead of trusting one.