Silverdale, PA 18927 Frost Dates
18927, near Silverdale, PA: the frost window
Around 04/26 is the usual last spring frost, about 241 days away. Fall's first freeze usually shows up around 10/17, roughly 175 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Silverdale 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
Silverdale's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Silverdale against the rest of the dataset
At roughly 175 frost-free days, Silverdale places 27,116 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,229 of 2,088.
Learn more
Two guides worth reading on 18927: the frost range, on how to read the range around Silverdale's dates instead of trusting one, and local microclimates, on what one yard in Silverdale can differ from the 18927 normal.