Muscle Shoals, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.8 °C (low) to 22.3 °C (high). Annual precipitation averages 1482.1 Millimeters. Muscle Shoals is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.1 °C | 10.4 °C | 132.08 mm |
| February | 0.9 °C | 12.9 °C | 137.16 mm |
| March | 4.7 °C | 17.7 °C | 138.18 mm |
| April | 9.3 °C | 22.7 °C | 128.52 mm |
| May | 14.3 °C | 26.7 °C | 129.29 mm |
| June | 18.8 °C | 30.7 °C | 118.62 mm |
| July | 20.7 °C | 32.2 °C | 129.03 mm |
| August | 19.9 °C | 31.9 °C | 110.24 mm |
| September | 16.4 °C | 29.3 °C | 105.16 mm |
| October | 9.6 °C | 23.7 °C | 96.27 mm |
| November | 3.5 °C | 17.1 °C | 104.39 mm |
| December | 0.6 °C | 11.9 °C | 153.16 mm |
| Annual | 9.8 °C | 22.3 °C | 1482.1 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |