Martinsburg, WV 25405 Frost Dates
25405, 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.
How much risk comes with planting early here
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
At roughly 187 frost-free days, Martinsburg places 22,305 of 40,283 ZIP codes in this dataset. Within WV, it ranks 335 of 885.
Learn more
Two guides worth reading on 25405: local microclimates, on what one yard in Martinsburg can differ from the 25405 normal, and zone vs. frost date, on why Zone 7a and Martinsburg's frost date answer different questions.