Frost dates for Newcomb, TN
At Newcomb, the median last spring frost (32°F) is Apr 18 and the median first fall frost is Oct 24, for a typical growing season of 187 days. For a 90% chance that the last frost has passed, wait until May 3. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Apr 18Last spring frost (median)50% chance of 32°F after this date
- May 3Safer planting date10% chance of 32°F after this date
- Oct 24First fall frost (median)50% chance of 32°F by this date
- 187 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 16 | Apr 30 | May 13 |
| 32°F | Apr 3 | Apr 18 | May 3 |
| 28°F | Mar 18 | Apr 3 | Apr 20 |
| 24°F | Feb 28 | Mar 21 | Apr 5 |
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 4 | Oct 15 | Oct 26 |
| 32°F | Oct 11 | Oct 24 | Nov 4 |
| 28°F | Oct 19 | Nov 1 | Nov 16 |
| 24°F | Nov 1 | Nov 12 | Dec 1 |
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 | 150 days | 168 days | 186 days |
| 32°F | 169 days | 187 days | 207 days |
| 28°F | 191 days | 211 days | 233 days |
| 24°F | 213 days | 236 days | 263 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 |
|---|---|---|---|
| 37819 | 7a | 0 to 5°F | 3 km |
| 37762 | 7a | 0 to 5°F | 6 km |
| 37729 | 7b | 5 to 10°F | 13 km |
| 37847 | 7a | 0 to 5°F | 16 km |
| 37892 | 7a | 0 to 5°F | 17 km |
| 37730 | 7a | 0 to 5°F | 18 km |
| 37715 | 7a | 0 to 5°F | 19 km |
| 37766 | 7a | 0 to 5°F | 19 km |
| 40940 | 7b | 5 to 10°F | 22 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 USC00406493, at 36.5517, -84.1728, elevation 309 m (1,014 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 107.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Oneida (32 km)
- Norris (39 km)
- Tazewell (56 km)
- Pickett State Park (56 km)
- Oak Ridge Asos (59 km)
- Oak Ridge Atdd (61 km)
- Allardt (66 km)
- Lancing 6 NW (67 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.