Irvington, KY 40171 Frost Dates
40171, near Irvington, KY: the frost window
Typically, the last spring freeze lands around 04/02, roughly 217 days out. Fall's first freeze usually shows up around 11/07, roughly 218 days after the last spring frost.
Irvington sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Irvington'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 04/02 isn't a guarantee
04/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/20 and only about 1 year in 10 sees frost after that.
Irvington against the rest of the dataset
About 218 days separate Irvington's last and first frost, putting it 13,301 of 40,283 ZIP codes nationally. Within KY, it ranks 28 of 909.
Learn more
Two guides worth reading on 40171: zone vs. frost date, on why Zone 7a and Irvington's frost date answer different questions, and the frost range, on how to read the range around Irvington's dates instead of trusting one.