Nitro, WV 25313 Frost Dates
25313, near Nitro, WV: the frost window
Around 04/23 is the usual last spring frost, about 238 days away. Fall's first freeze usually shows up around 10/20, roughly 180 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Nitro in Zone 7a (0 to 5°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
Nitro'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.
Why 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Nitro against the rest of the dataset
At roughly 180 frost-free days, Nitro places 24,843 of 40,283 ZIP codes in this dataset. Within WV, it ranks 467 of 885.
Learn more
Two guides worth reading on 25313: zone vs. frost date, on why Zone 7a and Nitro's frost date answer different questions, and the frost range, on how to read the range around Nitro's dates instead of trusting one.