West Chester, PA 19383 Frost Dates
West Chester, PA: when does the frost end?
The last spring frost here typically falls around 04/26, about 241 days from today. Fall's first freeze usually shows up around 10/18, roughly 174 days after the last spring frost.
West Chester sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 7 weeks until West Chester's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around West Chester's last frost
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
West Chester against the rest of the dataset
West Chester's growing season runs about 174 days, ranking 27,362 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,282 of 2,088.
Learn more
Before leaning on 19383's figures: local microclimates explains what one yard in West Chester can differ from the 19383 normal, while zone vs. frost date explains why Zone 7a and West Chester's frost date answer different questions.