Frost dates for Hamilton 3 S, AL
At Hamilton 3 S, the median last spring frost (32°F) is Apr 11 and the median first fall frost is Oct 27, for a typical growing season of 198 days. For a 90% chance that the last frost has passed, wait until Apr 27. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 11Last spring frost (median)50% chance of 32°F after this date
- Apr 27Safer planting date10% chance of 32°F after this date
- Oct 27First fall frost (median)50% chance of 32°F by this date
- 198 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 7 | Apr 23 | May 7 |
| 32°F | Mar 26 | Apr 11 | Apr 27 |
| 28°F | Mar 11 | Mar 31 | Apr 16 |
| 24°F | Feb 24 | Mar 16 | Apr 4 |
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 27 | Nov 10 |
| 28°F | Oct 22 | Nov 4 | Nov 25 |
| 24°F | Nov 1 | Nov 17 | Dec 7 |
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 | 160 days | 179 days | 199 days |
| 32°F | 178 days | 198 days | 220 days |
| 28°F | 199 days | 222 days | 247 days |
| 24°F | 220 days | 248 days | 278 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 |
|---|---|---|---|
| 35570 | 7b | 5 to 10°F | 7 km |
| 35552 | 7b | 5 to 10°F | 14 km |
| 35544 | 7b | 5 to 10°F | 15 km |
| 35593 | 7b | 5 to 10°F | 30 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 USC00013645, at 34.0967, -87.9914, elevation 133 m (435 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 96.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Winfield 2 SW (25 km)
- Haleyville (36 km)
- Vernon (42 km)
- Fayette (46 km)
- Russellville 4 SSE (47 km)
- Russellville #2 (52 km)
- Jasper (66 km)
- Addison (77 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.