Frost dates for Milan Exp. Station, TN
At Milan Exp. Station, the median last spring frost (32°F) is Apr 4 and the median first fall frost is Oct 28, for a typical growing season of 206 days. For a 90% chance that the last frost has passed, wait until Apr 21. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 4Last spring frost (median)50% chance of 32°F after this date
- Apr 21Safer planting date10% chance of 32°F after this date
- Oct 28First fall frost (median)50% chance of 32°F by this date
- 206 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 7b (5 to 10°F) · see all zone 7b frost dates
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 31 | Apr 15 | May 1 |
| 32°F | Mar 17 | Apr 4 | Apr 21 |
| 28°F | Mar 4 | Mar 25 | Apr 11 |
| 24°F | Feb 19 | Mar 11 | Apr 2 |
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 10 |
| 28°F | Oct 25 | Nov 6 | Nov 26 |
| 24°F | Nov 3 | Nov 17 | Dec 8 |
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 | 165 days | 185 days | 206 days |
| 32°F | 184 days | 206 days | 227 days |
| 28°F | 203 days | 226 days | 252 days |
| 24°F | 225 days | 250 days | 280 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 |
|---|---|---|---|
| 38358 | 7b | 5 to 10°F | 3 km |
| 38220 | 7b | 5 to 10°F | 8 km |
| 38348 | 7b | 5 to 10°F | 10 km |
| 38338 | 7b | 5 to 10°F | 13 km |
| 38258 | 7b | 5 to 10°F | 14 km |
| 38316 | 7b | 5 to 10°F | 17 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 USC00406012, at 35.9328, -88.7267, elevation 126 m (415 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 90.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Jackson 4 NE (26 km)
- Huntingdon Water Plant (28 km)
- Jackson Exp. Station (36 km)
- Alamo 1 N (38 km)
- Dresden (39 km)
- Jackson McKellar Airport (41 km)
- Lexington (44 km)
- Martin U Of T Branch E (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.