Mountville, PA 17575 Frost Dates
Mountville, PA: when does the frost end?
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/10, roughly 162 days after the last spring frost.
Mountville 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 6 weeks until Mountville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Mountville against the rest of the dataset
At roughly 162 frost-free days, Mountville places 31,736 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,659 of 2,088.
Learn more
Before leaning on 17575's figures: local microclimates explains what one yard in Mountville can differ from the 17575 normal, while zone vs. frost date explains why Zone 7a and Mountville's frost date answer different questions.