Newtown, PA 18940 Frost Dates
Newtown, PA: when does the frost end?
The last spring frost here typically falls around 04/10, about 225 days from today. Fall's first freeze usually shows up around 11/01, roughly 202 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Newtown 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
With roughly 9 weeks until Newtown's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Newtown's last frost
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/25 and only about 1 year in 10 sees frost after that.
Newtown against the rest of the dataset
About 202 days separate Newtown's last and first frost, putting it 17,253 of 40,283 ZIP codes nationally. Within PA, it ranks 223 of 2,088.
Learn more
Before leaning on 18940's figures: the frost range explains how to read the range around Newtown's dates instead of trusting one, while local microclimates explains what one yard in Newtown can differ from the 18940 normal.