Slatington, PA 18066 Frost Dates
Slatington, PA: when does the frost end?
The last spring frost here typically falls around 04/21, about 236 days from today. Fall's first freeze usually shows up around 10/23, roughly 184 days after the last spring frost.
Zone 6b (-5 to 0°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 Slatington, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Slatington's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/21 isn't a guarantee
04/21 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 05/09 and only about 1 year in 10 sees frost after that.
Slatington against the rest of the dataset
At roughly 184 frost-free days, Slatington places 23,514 of 40,283 ZIP codes in this dataset. Within PA, it ranks 779 of 2,088.
Learn more
Before leaning on 18066's figures: the frost range explains how to read the range around Slatington's dates instead of trusting one, while local microclimates explains what one yard in Slatington can differ from the 18066 normal.