Millersville, PA 17565 Frost Dates
17565, near Millersville, PA: the frost window
The last spring frost here typically falls around 04/18, about 233 days from today. Fall's first freeze usually shows up around 10/25, roughly 186 days after the last spring frost.
Millersville 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.
Stretching the season past the first frost
Millersville's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Millersville against the rest of the dataset
Millersville's growing season runs about 186 days, ranking 22,756 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 645 of 2,088.
Learn more
Two guides worth reading on 17565: local microclimates, on what one yard in Millersville can differ from the 17565 normal, and zone vs. frost date, on why Zone 7a and Millersville's frost date answer different questions.