St. Clairsville, PA 16667 Frost Dates
16667, near St. Clairsville, PA: the frost window
Typically, the last spring freeze lands around 04/29, roughly 244 days out. Fall's first freeze usually shows up around 10/13, roughly 167 days after the last spring frost.
St. Clairsville 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
St. Clairsville'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 St. Clairsville's last frost
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
St. Clairsville against the rest of the dataset
St. Clairsville's growing season runs about 167 days, ranking 30,244 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,523 of 2,088.
Learn more
Two guides worth reading on 16667: local microclimates, on what one yard in St. Clairsville can differ from the 16667 normal, and zone vs. frost date, on why Zone 6b and St. Clairsville's frost date answer different questions.