Mount Holly Springs, PA 17065 Frost Dates
Mount Holly Springs, PA: when does the frost end?
Typically, the last spring freeze lands around 04/15, roughly 230 days out. Fall's first freeze usually shows up around 10/27, roughly 194 days after the last spring frost.
Mount Holly Springs 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 9 weeks until Mount Holly Springs'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
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/04 and only about 1 year in 10 sees frost after that.
Mount Holly Springs against the rest of the dataset
Mount Holly Springs's growing season runs about 194 days, ranking 19,503 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 383 of 2,088.
Learn more
Before leaning on 17065's figures: local microclimates explains what one yard in Mount Holly Springs can differ from the 17065 normal, while zone vs. frost date explains why Zone 7a and Mount Holly Springs's frost date answer different questions.