Mount Pleasant, PA 15666 Frost Dates
15666, near Mount Pleasant, PA: the frost window
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/13, roughly 164 days after the last spring frost.
Mount Pleasant sits in USDA Zone 6b (-5 to 0°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
Mount Pleasant's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Mount Pleasant's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Mount Pleasant against the rest of the dataset
Mount Pleasant's growing season runs about 164 days, ranking 30,924 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,568 of 2,088.
Learn more
Two guides worth reading on 15666: local microclimates, on what one yard in Mount Pleasant can differ from the 15666 normal, and zone vs. frost date, on why Zone 6b and Mount Pleasant's frost date answer different questions.