Knoxville, TN 37950 Frost Dates
Frost dates for Knoxville, TN, ZIP 37950
Typically, the last spring freeze lands around 04/01, roughly 216 days out. The first fall frost typically arrives around 11/02, about 215 frost-free days later.
Zone 7b (5 to 10°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 Knoxville, not a forecast for this year.
What to do before the first frost
Zone 7b around Knoxville 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.
How much risk comes with planting early here
04/01 is the middle of 30 years of NOAA records, not a promise. Plant by 03/14 and you're betting against frost in roughly 9 years out of 10. 04/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Knoxville compares
About 215 days separate Knoxville's last and first frost, putting it 14,007 of 40,283 ZIP codes nationally. Within TN, it ranks 223 of 770.
Learn more
zone vs. frost date explains why Zone 7b and Knoxville's frost date answer different questions, and the frost range explains how to read the range around Knoxville's dates instead of trusting one.