Frost dates for Clarksville Outlaw Airport, TN
At Clarksville Outlaw Airport, the median last spring frost (32°F) is Apr 6 and the median first fall frost is Oct 28, for a typical growing season of 204 days. For a 90% chance that the last frost has passed, wait until Apr 23. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Apr 6Last spring frost (median)50% chance of 32°F after this date
- Apr 23Safer planting date10% chance of 32°F after this date
- Oct 28First fall frost (median)50% chance of 32°F by this date
- 204 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 4 |
| 32°F | Mar 20 | Apr 6 | Apr 23 |
| 28°F | Mar 7 | Mar 25 | Apr 11 |
| 24°F | Feb 21 | Mar 13 | 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 7 | Oct 19 | Oct 31 |
| 32°F | Oct 15 | Oct 28 | Nov 9 |
| 28°F | Oct 26 | Nov 7 | Nov 24 |
| 24°F | Nov 4 | Nov 18 | Dec 7 |
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 | 163 days | 183 days | 202 days |
| 32°F | 183 days | 204 days | 226 days |
| 28°F | 205 days | 227 days | 251 days |
| 24°F | 226 days | 253 days | 278 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 |
|---|---|---|---|
| 42223 | 7a | 0 to 5°F | 5 km |
| 37042 | 7b | 5 to 10°F | 6 km |
| 42262 | 7a | 0 to 5°F | 8 km |
| 42266 | 7a | 0 to 5°F | 14 km |
| 37191 | 7b | 5 to 10°F | 16 km |
| 42254 | 7a | 0 to 5°F | 20 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 USW00003894, at 36.6239, -87.4194, elevation 171 m (560 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 80.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Clarksville Wastewater Plant (11 km)
- Clarksville No.2 (16 km)
- Cheatham L&d (38 km)
- Dover 1 W (43 km)
- Tennessee Ridge (47 km)
- Springfield Exp. Station (54 km)
- Charlotte (55 km)
- Montgomery Bell State Park (59 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.