Watterson Park, KY 40221 Frost Dates
40221, near Watterson Park, KY: the frost window
Around 04/03 is the usual last spring frost, about 218 days away. Fall's first freeze usually shows up around 11/03, roughly 214 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Watterson Park 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
Watterson Park's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/03 isn't a guarantee
04/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/19 and only about 1 year in 10 sees frost after that.
Watterson Park against the rest of the dataset
About 214 days separate Watterson Park's last and first frost, putting it 14,288 of 40,283 ZIP codes nationally. Within KY, it ranks 40 of 909.
Learn more
Two guides worth reading on 40221: the frost range, on how to read the range around Watterson Park's dates instead of trusting one, and local microclimates, on what one yard in Watterson Park can differ from the 40221 normal.