St. Mary, KY 40063 Frost Dates
When can you plant in St. Mary, KY?
The last spring frost here typically falls around 04/22, about 237 days from today. The first fall frost typically arrives around 10/20, about 180 frost-free days later.
Zone 7a (0 to 5°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 St. Mary, not a forecast for this year.
What to do before the first frost
About 8 weeks of growing season left in St. Mary before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around St. Mary's last frost
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/08 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Mary compares
At roughly 180 frost-free days, St. Mary places 25,103 of 40,283 ZIP codes in this dataset. Within KY, it ranks 796 of 909.
Learn more
local microclimates covers what one yard in St. Mary can differ from the 40063 normal. zone vs. frost date covers why Zone 7a and St. Mary's frost date answer different questions.