St. Marys, WV 26170 Frost Dates
26170, near St. Marys, WV: the frost window
Around 04/26 is the usual last spring frost, about 241 days away. Fall's first freeze usually shows up around 10/17, roughly 173 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts St. Marys in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
St. Marys'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.
How much risk comes with planting early here
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
St. Marys against the rest of the dataset
At roughly 173 frost-free days, St. Marys places 27,949 of 40,283 ZIP codes in this dataset. Within WV, it ranks 636 of 885.
Learn more
Two guides worth reading on 26170: zone vs. frost date, on why Zone 6b and St. Marys's frost date answer different questions, and the frost range, on how to read the range around St. Marys's dates instead of trusting one.