Williamson, WV 41527 Frost Dates
Williamson, WV: when does the frost end?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. Fall's first freeze usually shows up around 10/24, roughly 186 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Williamson 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
With roughly 8 weeks until Williamson's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Williamson's last frost
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Williamson against the rest of the dataset
At roughly 186 frost-free days, Williamson places 22,834 of 40,283 ZIP codes in this dataset. Within WV, it ranks 357 of 885.
Learn more
Before leaning on 41527's figures: local microclimates explains what one yard in Williamson can differ from the 41527 normal, while zone vs. frost date explains why Zone 7a and Williamson's frost date answer different questions.