Frost dates for Lenoir City, TN
At Lenoir City, the median last spring frost (32°F) is Apr 5 and the median first fall frost is Nov 1, for a typical growing season of 210 days. For a 90% chance that the last frost has passed, wait until Apr 21. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 5Last spring frost (median)50% chance of 32°F after this date
- Apr 21Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 210 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 3 | Apr 18 | May 5 |
| 32°F | Mar 19 | Apr 5 | Apr 21 |
| 28°F | Mar 6 | Mar 25 | Apr 9 |
| 24°F | Feb 16 | Mar 10 | Mar 30 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 12 | Oct 25 | Nov 5 |
| 32°F | Oct 20 | Nov 1 | Nov 15 |
| 28°F | Oct 31 | Nov 12 | Dec 1 |
| 24°F | Nov 8 | Nov 27 | Dec 19 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 166 days | 188 days | 208 days |
| 32°F | 189 days | 210 days | 231 days |
| 28°F | 209 days | 233 days | 258 days |
| 24°F | 234 days | 261 days | 291 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 37772 | 7b | 5 to 10°F | 5 km |
| 37771 | 7b | 5 to 10°F | 7 km |
| 37774 | 7b | 5 to 10°F | 11 km |
| 37934 | 7b | 5 to 10°F | 12 km |
| 37737 | 7b | 5 to 10°F | 13 km |
| 37742 | 7b | 5 to 10°F | 14 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00405158, at 35.7875, -84.2622, elevation 239 m (785 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 76.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Oak Ridge Atdd (24 km)
- Knoxville McGhee Tyson Airport (25 km)
- Kingston (25 km)
- Oak Ridge Asos (26 km)
- Knoxville Exp. Station (30 km)
- Rockwood 2 (39 km)
- Decatur 7ne (40 km)
- Tellico Plains (47 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.