Frost dates for Heflin, AL
At Heflin, the median last spring frost (32°F) is Apr 6 and the median first fall frost is Oct 31, for a typical growing season of 206 days. For a 90% chance that the last frost has passed, wait until Apr 22. Nearby ZIP codes are in USDA hardiness zone 8a.
- Apr 6Last spring frost (median)50% chance of 32°F after this date
- Apr 22Safer planting date10% chance of 32°F after this date
- Oct 31First fall frost (median)50% chance of 32°F by this date
- 206 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 4 | Apr 20 | May 4 |
| 32°F | Mar 20 | Apr 6 | Apr 22 |
| 28°F | Mar 2 | Mar 25 | Apr 10 |
| 24°F | Feb 14 | Mar 11 | 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 9 | Oct 22 | Nov 2 |
| 32°F | Oct 19 | Oct 31 | Nov 12 |
| 28°F | Oct 27 | Nov 9 | Nov 28 |
| 24°F | Nov 5 | Nov 22 | Dec 14 |
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 | 184 days | 204 days |
| 32°F | 186 days | 206 days | 226 days |
| 28°F | 206 days | 230 days | 255 days |
| 24°F | 229 days | 257 days | 290 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 |
|---|---|---|---|
| 36264 | 8a | 10 to 15°F | 7 km |
| 36207 | 8a | 10 to 15°F | 10 km |
| 36262 | 8a | 10 to 15°F | 21 km |
| 36269 | 8a | 10 to 15°F | 23 km |
| 36273 | 8a | 10 to 15°F | 24 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 USC00013775, at 33.6436, -85.6092, elevation 305 m (1,000 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 72.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Anniston Metro Airport (24 km)
- Ashland 3 ENE (42 km)
- Talladega 10 NNE (42 km)
- Gadsden (55 km)
- Talladega (55 km)
- Centre (57 km)
- Rock Mills (62 km)
- Sylacauga 4 NE (74 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.