Frost dates for Cullman Nahs, AL
At Cullman Nahs, the median last spring frost (32°F) is Apr 7 and the median first fall frost is Oct 29, for a typical growing season of 204 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 7Last spring frost (median)50% chance of 32°F after this date
- Apr 22Safer planting date10% chance of 32°F after this date
- Oct 29First fall frost (median)50% chance of 32°F by this date
- 204 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 5 | Apr 20 | May 4 |
| 32°F | Mar 22 | Apr 7 | Apr 22 |
| 28°F | Mar 7 | Mar 28 | Apr 12 |
| 24°F | Feb 21 | Mar 13 | Apr 1 |
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 1 |
| 32°F | Oct 18 | Oct 29 | Nov 12 |
| 28°F | Oct 25 | Nov 9 | Nov 28 |
| 24°F | Nov 3 | 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 | 182 days | 203 days |
| 32°F | 185 days | 204 days | 225 days |
| 28°F | 204 days | 227 days | 253 days |
| 24°F | 227 days | 255 days | 284 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 |
|---|---|---|---|
| 35055 | 8a | 10 to 15°F | 6 km |
| 35058 | 8a | 10 to 15°F | 8 km |
| 35057 | 8a | 10 to 15°F | 13 km |
| 35621 | 8a | 10 to 15°F | 17 km |
| 35179 | 8a | 10 to 15°F | 18 km |
| 35083 | 8a | 10 to 15°F | 19 km |
| 35019 | 8a | 10 to 15°F | 19 km |
| 35077 | 8a | 10 to 15°F | 19 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 USC00012096, at 34.1925, -86.7972, elevation 247 m (811 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 76.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Cullman 3 ENE (0 km)
- Saint Bernard (3 km)
- Hanceville (14 km)
- Addison (36 km)
- Decatur 4SE (44 km)
- Oneonta (46 km)
- Guntersville (46 km)
- Guntersville No.2 (46 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.