Frost dates for Ardmore, TN
At Ardmore, the median last spring frost (32°F) is Mar 30 and the median first fall frost is Nov 4, for a typical growing season of 223 days. For a 90% chance that the last frost has passed, wait until Apr 14. Nearby ZIP codes are in USDA hardiness zone 7b.
- Mar 30Last spring frost (median)50% chance of 32°F after this date
- Apr 14Safer planting date10% chance of 32°F after this date
- Nov 4First fall frost (median)50% chance of 32°F by this date
- 223 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 24 | Apr 9 | Apr 24 |
| 32°F | Mar 9 | Mar 30 | Apr 14 |
| 28°F | Feb 25 | Mar 17 | Apr 3 |
| 24°F | Feb 9 | Mar 4 | Mar 25 |
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 15 | Oct 27 | Nov 8 |
| 32°F | Oct 23 | Nov 4 | Nov 23 |
| 28°F | Nov 1 | Nov 18 | Dec 5 |
| 24°F | Nov 12 | Dec 1 | Dec 27 |
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 | 180 days | 202 days | 222 days |
| 32°F | 199 days | 223 days | 247 days |
| 28°F | 222 days | 247 days | 275 days |
| 24°F | 245 days | 272 days | 301 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 |
|---|---|---|---|
| 38449 | 7b | 5 to 10°F | 6 km |
| 35739 | 7b | 5 to 10°F | 6 km |
| 38455 | 7b | 5 to 10°F | 8 km |
| 38453 | 7b | 5 to 10°F | 15 km |
| 38488 | 7b | 5 to 10°F | 16 km |
| 35620 | 7b | 5 to 10°F | 16 km |
| 35773 | 7b | 5 to 10°F | 18 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 USC00400235, at 34.9925, -86.8561, elevation 270 m (885 ft).
- Data quality: Estimated from nearby stations (2+ years), 6 years of freeze data.
- Average days per year at or below 32°F: 66.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Pulaski Wastewater Plant (27 km)
- Fayetteville Water Plant (33 km)
- Lewisburg Exp. Station (47 km)
- Lawrenceburg Filt Plant (53 km)
- Lynchburg (56 km)
- Shelbyville Water Dept (65 km)
- Mount Pleasant 1n (70 km)
- Tullahoma (71 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.