Mount Vernon, KY 40473 Frost Dates
When can you plant in Mount Vernon, KY?
Around 04/18 is the usual last spring frost, about 233 days away. The first fall frost typically arrives around 10/24, about 189 frost-free days later.
Mount Vernon 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.
What to do before the first frost
About 8 weeks of growing season left in Mount Vernon before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Mount Vernon's last frost
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mount Vernon compares
At roughly 189 frost-free days, Mount Vernon places 21,601 of 40,283 ZIP codes in this dataset. Within KY, it ranks 565 of 909.
Learn more
zone vs. frost date covers why Zone 7a and Mount Vernon's frost date answer different questions. the frost range covers how to read the range around Mount Vernon's dates instead of trusting one.