Knoxville, TN 37928 Frost Dates
Knoxville, TN: when does the frost end?
The last spring frost here typically falls around 04/01, about 216 days from today. Fall's first freeze usually shows up around 11/02, roughly 215 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Knoxville in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 9 weeks until Knoxville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/01 isn't a guarantee
04/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/17 and only about 1 year in 10 sees frost after that.
Knoxville against the rest of the dataset
About 215 days separate Knoxville's last and first frost, putting it 14,002 of 40,283 ZIP codes nationally. Within TN, it ranks 218 of 770.
Learn more
Before leaning on 37928's figures: the frost range explains how to read the range around Knoxville's dates instead of trusting one, while local microclimates explains what one yard in Knoxville can differ from the 37928 normal.