Frost dates for Chattanooga Lovell Airport, TN
At Chattanooga Lovell Airport, the median last spring frost (32°F) is Mar 24 and the median first fall frost is Nov 9, for a typical growing season of 230 days. For a 90% chance that the last frost has passed, wait until Apr 8. Nearby ZIP codes are in USDA hardiness zone 8a.
- Mar 24Last spring frost (median)50% chance of 32°F after this date
- Apr 8Safer planting date10% chance of 32°F after this date
- Nov 9First fall frost (median)50% chance of 32°F by this date
- 230 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 | Mar 19 | Apr 4 | Apr 20 |
| 32°F | Mar 6 | Mar 24 | Apr 8 |
| 28°F | Feb 18 | Mar 11 | Mar 30 |
| 24°F | Jan 26 | Feb 23 | Mar 18 |
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 19 | Oct 31 | Nov 11 |
| 32°F | Oct 27 | Nov 9 | Nov 26 |
| 28°F | Nov 6 | Nov 22 | Dec 13 |
| 24°F | Nov 16 | Dec 8 | Jan 5 |
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 | 189 days | 208 days | 228 days |
| 32°F | 210 days | 230 days | 254 days |
| 28°F | 233 days | 257 days | 285 days |
| 24°F | 258 days | 289 days | 322 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 |
|---|---|---|---|
| 37411 | 8a | 10 to 15°F | 3 km |
| 37421 | 8a | 10 to 15°F | 4 km |
| 37412 | 8a | 10 to 15°F | 4 km |
| 37406 | 8a | 10 to 15°F | 6 km |
| 37404 | 8a | 10 to 15°F | 7 km |
| 30726 | 8a | 10 to 15°F | 8 km |
| 37416 | 8a | 10 to 15°F | 9 km |
| 37351 | 8a | 10 to 15°F | 9 km |
| 37415 | 8a | 10 to 15°F | 13 km |
| 37315 | 8a | 10 to 15°F | 14 km |
| 37302 | 8a | 10 to 15°F | 16 km |
| 37363 | 8a | 10 to 15°F | 17 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 USW00013882, at 35.0311, -85.2014, elevation 204 m (671 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 56.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lookout Mtn-Point Park (13 km)
- Soddy Daisy-Mowbray Mountain (28 km)
- Whitwell-Sequatchie Valley (38 km)
- Cleveland Fltr Plant (43 km)
- Dayton 2se (52 km)
- Coalmont (59 km)
- Monteagle (62 km)
- Pikeville (63 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.