Frost dates for Troy 2 W, AL
At Troy 2 W, the median last spring frost (32°F) is Mar 17 and the median first fall frost is Nov 16, for a typical growing season of 242 days. For a 90% chance that the last frost has passed, wait until Apr 3. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 17Last spring frost (median)50% chance of 32°F after this date
- Apr 3Safer planting date10% chance of 32°F after this date
- Nov 16First fall frost (median)50% chance of 32°F by this date
- 242 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 13 | Apr 1 | Apr 18 |
| 32°F | Feb 25 | Mar 17 | Apr 3 |
| 28°F | Feb 2 | Mar 5 | Mar 24 |
| 24°F | Jan 10 | Feb 16 | Mar 14 |
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 22 | Nov 4 | Nov 20 |
| 32°F | Nov 1 | Nov 16 | Dec 4 |
| 28°F | Nov 10 | Nov 29 | Jan 1 |
| 24°F | Nov 21 | Dec 18 | Jan 23 |
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 | 196 days | 219 days | 244 days |
| 32°F | 218 days | 242 days | 270 days |
| 28°F | 245 days | 272 days | 306 days |
| 24°F | 270 days | 306 days | 343 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 97% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 36079 | 8b | 15 to 20°F | 3 km |
| 36035 | 8b | 15 to 20°F | 12 km |
| 36034 | 8b | 15 to 20°F | 22 km |
| 36346 | 8b | 15 to 20°F | 27 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 USW00023801, at 31.7900, -86.0003, elevation 144 m (472 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 40.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Troy (3 km)
- Troy Muni Airport (8 km)
- Highland Home (26 km)
- Highland Home 2 S (33 km)
- Highland Home #2 (34 km)
- Union Springs 9 S (35 km)
- Clayton (53 km)
- Enterprise 4 W (56 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.