Dayton, PA 16222 Frost Dates
Dayton, PA: when does the frost end?
Around 05/10 is the usual last spring frost, about 255 days away. Fall's first freeze usually shows up around 10/12, roughly 155 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Dayton in Zone 6a (-10 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
With roughly 6 weeks until Dayton'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
05/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Dayton against the rest of the dataset
At roughly 155 frost-free days, Dayton places 34,077 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,810 of 2,088.
Learn more
Before leaning on 16222's figures: the frost range explains how to read the range around Dayton's dates instead of trusting one, while local microclimates explains what one yard in Dayton can differ from the 16222 normal.