Frost dates for Newfound Gap, TN
At Newfound Gap, the median last spring frost (32°F) is May 3 and the median first fall frost is Oct 15, for a typical growing season of 162 days. For a 90% chance that the last frost has passed, wait until May 17. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- May 3Last spring frost (median)50% chance of 32°F after this date
- May 17Safer planting date10% chance of 32°F after this date
- Oct 15First fall frost (median)50% chance of 32°F by this date
- 162 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 30 | May 12 | May 28 |
| 32°F | Apr 18 | May 3 | May 17 |
| 28°F | Apr 7 | Apr 23 | May 8 |
| 24°F | Mar 26 | Apr 10 | Apr 28 |
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 | Sep 21 | Oct 6 | Oct 18 |
| 32°F | Oct 1 | Oct 15 | Oct 26 |
| 28°F | Oct 9 | Oct 23 | Nov 5 |
| 24°F | Oct 18 | Nov 1 | Nov 16 |
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 | 126 days | 146 days | 165 days |
| 32°F | 144 days | 162 days | 183 days |
| 28°F | 159 days | 182 days | 202 days |
| 24°F | 181 days | 202 days | 225 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 37738 | 7a | 0 to 5°F | 8 km |
| 28719 | 7a | 0 to 5°F | 14 km |
| 37863 | 7b | 5 to 10°F | 23 km |
| 28789 | 7a | 0 to 5°F | 25 km |
| 37862 | 7b | 5 to 10°F | 26 km |
| 28785 | 7a | 0 to 5°F | 27 km |
| 28713 | 7b | 5 to 10°F | 28 km |
| 37876 | 7b | 5 to 10°F | 29 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 USC00406500, at 35.6108, -83.4289, elevation 1536 m (5,040 ft).
- Data quality: Representative (10+ years), 24 years of freeze data.
- Average days per year at or below 32°F: 120.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Mount Leconte (5 km)
- Gatlinburg 2 SW (13 km)
- Townsend 5s (31 km)
- Sevierville (39 km)
- Newport 1 NW (46 km)
- Knoxville McGhee Tyson Airport (55 km)
- Jefferson City (57 km)
- Knoxville Exp. Station (57 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.