Frost dates for Muscle Shoals Regional Airport, AL
At Muscle Shoals Regional Airport, the median last spring frost (32°F) is Mar 20 and the median first fall frost is Nov 8, for a typical growing season of 233 days. For a 90% chance that the last frost has passed, wait until Apr 6. Nearby ZIP codes are in USDA hardiness zone 8a.
- Mar 20Last spring frost (median)50% chance of 32°F after this date
- Apr 6Safer planting date10% chance of 32°F after this date
- Nov 8First fall frost (median)50% chance of 32°F by this date
- 233 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 17 | Apr 2 | Apr 16 |
| 32°F | Feb 28 | Mar 20 | Apr 6 |
| 28°F | Feb 14 | Mar 6 | Mar 25 |
| 24°F | Jan 28 | Feb 20 | Mar 13 |
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 16 | Oct 29 | Nov 11 |
| 32°F | Oct 25 | Nov 8 | Nov 26 |
| 28°F | Nov 4 | Nov 20 | Dec 9 |
| 24°F | Nov 15 | Dec 6 | Jan 4 |
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 | 190 days | 211 days | 231 days |
| 32°F | 211 days | 233 days | 257 days |
| 28°F | 235 days | 260 days | 290 days |
| 24°F | 258 days | 289 days | 326 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 |
|---|---|---|---|
| 35661 | 8a | 10 to 15°F | 4 km |
| 35646 | 8a | 10 to 15°F | 9 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 USW00013896, at 34.7442, -87.5997, elevation 165 m (540 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 56.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Muscle Shoals Water Plant (4 km)
- Muscle Shoals 2 N (5 km)
- Courtland 2 WSW (25 km)
- Russellville #2 (29 km)
- Lexington (32 km)
- Russellville 4 SSE (34 km)
- Moulton 2 (40 km)
- Haleyville (57 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.