Palmyra, PA 17033 Frost Dates
17033, near Palmyra, PA: the frost window
The last spring frost here typically falls around 04/09, about 224 days from today. Fall's first freeze usually shows up around 11/02, roughly 206 days after the last spring frost.
Zone 7a (0 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 Palmyra, not a forecast for this year.
Stretching the season past the first frost
Palmyra's growing season runs out in roughly 9 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
04/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/25 and only about 1 year in 10 sees frost after that.
Palmyra against the rest of the dataset
Palmyra's growing season runs about 206 days, ranking 15,990 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 104 of 2,088.
Learn more
Two guides worth reading on 17033: zone vs. frost date, on why Zone 7a and Palmyra's frost date answer different questions, and the frost range, on how to read the range around Palmyra's dates instead of trusting one.