Williamstown, KY 41097 Frost Dates
41097, near Williamstown, KY: the frost window
Around 04/11 is the usual last spring frost, about 226 days away. Fall's first freeze usually shows up around 10/29, roughly 199 days after the last spring frost.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Williamstown, not a forecast for this year.
Stretching the season past the first frost
Williamstown's growing season runs out in roughly 9 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
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Williamstown against the rest of the dataset
About 199 days separate Williamstown's last and first frost, putting it 18,112 of 40,283 ZIP codes nationally. Within KY, it ranks 285 of 909.
Learn more
Two guides worth reading on 41097: the frost range, on how to read the range around Williamstown's dates instead of trusting one, and local microclimates, on what one yard in Williamstown can differ from the 41097 normal.