New Castle, KY 40058 Frost Dates
When can you plant in New Castle, KY?
Around 04/12 is the usual last spring frost, about 227 days away. 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.
How much risk comes with planting early here
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
About 193 days separate New Castle's last and first frost, putting it 20,001 of 40,283 ZIP codes nationally. Within KY, it ranks 415 of 909.
Learn more
zone vs. frost date covers why Zone 6b and New Castle's frost date answer different questions. the frost range covers how to read the range around New Castle's dates instead of trusting one.