Frost dates for Rock Mills, AL
At Rock Mills, the median last spring frost (32°F) is Apr 2 and the median first fall frost is Nov 3, for a typical growing season of 216 days. For a 90% chance that the last frost has passed, wait until Apr 18. Nearby ZIP codes are in USDA hardiness zone 8a.
- Apr 2Last spring frost (median)50% chance of 32°F after this date
- Apr 18Safer planting date10% chance of 32°F after this date
- Nov 3First fall frost (median)50% chance of 32°F by this date
- 216 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 30 | Apr 16 | May 1 |
| 32°F | Mar 13 | Apr 2 | Apr 18 |
| 28°F | Feb 24 | Mar 17 | Apr 6 |
| 24°F | Feb 2 | Feb 28 | Mar 22 |
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 11 | Oct 24 | Nov 6 |
| 32°F | Oct 21 | Nov 3 | Nov 19 |
| 28°F | Nov 1 | Nov 14 | Dec 1 |
| 24°F | Nov 11 | Dec 1 | Dec 25 |
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 | 171 days | 191 days | 213 days |
| 32°F | 191 days | 216 days | 240 days |
| 28°F | 216 days | 245 days | 272 days |
| 24°F | 247 days | 275 days | 309 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 |
|---|---|---|---|
| 36274 | 8a | 10 to 15°F | 7 km |
| 36855 | 8a | 10 to 15°F | 14 km |
| 30217 | 8a | 10 to 15°F | 21 km |
| 36276 | 8a | 10 to 15°F | 27 km |
| 36280 | 8a | 10 to 15°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 USC00017025, at 33.1581, -85.2911, elevation 229 m (750 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 73.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lafayette 2w (31 km)
- Ashland 3 ENE (48 km)
- Camp Hill 2nw (50 km)
- Opelika (57 km)
- Heflin (62 km)
- Auburn No.2 (64 km)
- Alexander City (66 km)
- Anniston Metro Airport (71 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.