Red Lion, PA 17356 Frost Dates
Red Lion, PA: when does the frost end?
Around 04/26 is the usual last spring frost, about 241 days away. Fall's first freeze usually shows up around 10/19, roughly 177 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 Red Lion, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Red Lion's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Red Lion against the rest of the dataset
Red Lion's growing season runs about 177 days, ranking 26,097 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 944 of 2,088.
Learn more
Before leaning on 17356's figures: local microclimates explains what one yard in Red Lion can differ from the 17356 normal, while zone vs. frost date explains why Zone 7a and Red Lion's frost date answer different questions.