Frost dates for Sewanee, TN
At Sewanee, the median last spring frost (32°F) is Apr 2 and the median first fall frost is Nov 4, for a typical growing season of 216 days. For a 90% chance that the last frost has passed, wait until Apr 18. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 2Last spring frost (median)50% chance of 32°F after this date
- Apr 18Safer planting date10% chance of 32°F after this date
- Nov 4First fall frost (median)50% chance of 32°F by this date
- 216 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 29 | Apr 13 | Apr 30 |
| 32°F | Mar 16 | Apr 2 | Apr 18 |
| 28°F | Mar 4 | Mar 23 | Apr 7 |
| 24°F | Feb 20 | Mar 11 | Mar 31 |
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 13 | Oct 25 | Nov 6 |
| 32°F | Oct 22 | Nov 4 | Nov 22 |
| 28°F | Nov 1 | Nov 16 | Dec 5 |
| 24°F | Nov 10 | Nov 30 | Dec 21 |
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 | 172 days | 193 days | 214 days |
| 32°F | 196 days | 216 days | 240 days |
| 28°F | 214 days | 238 days | 263 days |
| 24°F | 235 days | 261 days | 289 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 |
|---|---|---|---|
| 37383 | 7b | 5 to 10°F | 1 km |
| 37375 | 7b | 5 to 10°F | 6 km |
| 37324 | 7b | 5 to 10°F | 8 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 USC00408184, at 35.2028, -85.9172, elevation 588 m (1,928 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 68.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Monteagle (7 km)
- Winchester 5se (11 km)
- Coalmont (27 km)
- Tullahoma (31 km)
- Manchester #2 (38 km)
- Whitwell-Sequatchie Valley (41 km)
- Lynchburg (42 km)
- Wartrace 6e (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.