Knoxville, TN 37914 Frost Dates
Frost dates for Knoxville, TN, ZIP 37914
The last spring frost here typically falls around 04/01, about 216 days from today. 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.
Why 04/01 isn't a guarantee
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
Knoxville's growing season runs about 215 days, ranking 13,993 of 40,283 US ZIP codes measured here, longest to shortest. Within TN, it ranks 209 of 770.
Learn more
the frost range explains how to read the range around Knoxville's dates instead of trusting one, and local microclimates explains what one yard in Knoxville can differ from the 37914 normal.