Martinsburg, WV 25401 Frost Dates
25401, near Martinsburg, WV: the frost window
Typically, the last spring freeze lands around 04/17, roughly 232 days out. Fall's first freeze usually shows up around 10/23, roughly 187 days after the last spring frost.
Martinsburg 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
Martinsburg's growing season runs out in roughly 8 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 Martinsburg's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
Martinsburg against the rest of the dataset
Martinsburg's growing season runs about 187 days, ranking 22,301 of 40,283 US ZIP codes measured here, longest to shortest. Within WV, it ranks 331 of 885.
Learn more
Two guides worth reading on 25401: the frost range, on how to read the range around Martinsburg's dates instead of trusting one, and local microclimates, on what one yard in Martinsburg can differ from the 25401 normal.