New Castle, KY 40050 Frost Dates
When can you plant in New Castle, KY?
The last spring frost here typically falls around 04/12, about 227 days from today. The first fall frost typically arrives around 10/25, about 193 frost-free days later.
New Castle sits in USDA Zone 6b (-5 to 0°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 New Castle before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around New Castle's last frost
04/12 is the middle of 30 years of NOAA records, not a promise. Plant by 03/29 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How New Castle compares
New Castle's growing season runs about 193 days, ranking 20,000 of 40,283 US ZIP codes measured here, longest to shortest. Within KY, it ranks 414 of 909.
Learn more
local microclimates covers what one yard in New Castle can differ from the 40050 normal. zone vs. frost date covers why Zone 6b and New Castle's frost date answer different questions.