Mayfield, KY 42066 Frost Dates
42066, near Mayfield, KY: the frost window
Typically, the last spring freeze lands around 04/09, roughly 224 days out. Fall's first freeze usually shows up around 10/19, roughly 192 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mayfield in Zone 7b (5 to 10°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
Mayfield's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/09 isn't a guarantee
04/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/28 and only about 1 year in 10 sees frost after that.
Mayfield against the rest of the dataset
Mayfield's growing season runs about 192 days, ranking 20,223 of 40,283 US ZIP codes measured here, longest to shortest. Within KY, it ranks 434 of 909.
Learn more
Two guides worth reading on 42066: the frost range, on how to read the range around Mayfield's dates instead of trusting one, and local microclimates, on what one yard in Mayfield can differ from the 42066 normal.