Millville, PA 17774 Frost Dates
17774, near Millville, PA: the frost window
Typically, the last spring freeze lands around 05/06, roughly 251 days out. Fall's first freeze usually shows up around 10/07, roughly 154 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Millville, not a forecast for this year.
Stretching the season past the first frost
Millville's growing season runs out in roughly 6 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
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Millville against the rest of the dataset
Millville's growing season runs about 154 days, ranking 34,378 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,898 of 2,088.
Learn more
Two guides worth reading on 17774: the frost range, on how to read the range around Millville's dates instead of trusting one, and local microclimates, on what one yard in Millville can differ from the 17774 normal.