Strasburg, PA 17537 Frost Dates
17537, near Strasburg, PA: the frost window
Around 04/18 is the usual last spring frost, about 233 days away. Fall's first freeze usually shows up around 10/25, roughly 186 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Strasburg in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Strasburg'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.
Why 04/18 isn't a guarantee
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.
Strasburg against the rest of the dataset
About 186 days separate Strasburg's last and first frost, putting it 22,811 of 40,283 ZIP codes nationally. Within PA, it ranks 669 of 2,088.
Learn more
Two guides worth reading on 17537: the frost range, on how to read the range around Strasburg's dates instead of trusting one, and local microclimates, on what one yard in Strasburg can differ from the 17537 normal.