Frost dates for Knoxville, Tennessee
In a typical year, Knoxville’s last spring frost lands around Apr 11 and the first fall frost around Oct 28, a growing season of about 200 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 7b.
Right now the growing season is open, with about 3 days until the typical first fall frost.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Mar 26 | Oct 13 |
| 50 percent | Apr 11 | Oct 28 |
| 90 percent | Apr 29 | Nov 9 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Knoxville is typically around 57°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Knoxville
- Garlic (Music)
Timing comes from the same temperature engine the app uses, run against Knoxville’s normals for today.
Common questions
When is the last frost in Knoxville, Tennessee?
Knoxville’s last spring frost falls around April 11 in a typical year. One year in ten it is done by March 26, and one year in ten frost holds on until April 29. Frost-sensitive planting usually waits for the late side of that band.
When is the first fall frost in Knoxville?
The first fall frost arrives around October 28 in a typical year, as early as October 13 in an early year and as late as November 9 in a late one.
How long is the growing season in Knoxville?
About 200 days, counted between the typical last spring frost and the typical first fall frost.
What USDA zone is Knoxville in?
Knoxville is in USDA hardiness zone 7b under the 2023 USDA Plant Hardiness Zone Map.
Dates come from 30-year NOAA climate normals for the nearest reporting station. They describe odds, not a forecast.
Nearby cities
- Somerset, KY (around Apr 5 to Oct 30)
- Asheville, NC (around Apr 6 to Oct 31)
- Cookeville, TN (around Apr 14 to Oct 25)
- Johnson City, TN (around Apr 19 to Oct 24)
- Chattanooga, TN (around Mar 31 to Nov 6)
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