Cowan, TN 37318 Frost Dates
Frost dates for Cowan, TN, ZIP 37318
The last spring frost here typically falls around 04/06, about 221 days from today. The first fall frost typically arrives around 10/29, about 204 frost-free days later.
The USDA Plant Hardiness Zone Map puts Cowan in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7b around Cowan has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/06 isn't a guarantee
04/06 is the middle of 30 years of NOAA records, not a promise. Plant by 03/19 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cowan compares
About 204 days separate Cowan's last and first frost, putting it 16,637 of 40,283 ZIP codes nationally. Within TN, it ranks 472 of 770.
Learn more
zone vs. frost date explains why Zone 7b and Cowan's frost date answer different questions, and the frost range explains how to read the range around Cowan's dates instead of trusting one.