Red Bay, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.9 °C (low) to 22.2 °C (high). Annual precipitation averages 1528.6 Millimeters. Red Bay is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.1 °C | 10.2 °C | 136.4 mm |
| February | 0.7 °C | 12.9 °C | 138.43 mm |
| March | 4.7 °C | 17.7 °C | 143.51 mm |
| April | 9.5 °C | 22.9 °C | 136.4 mm |
| May | 14.6 °C | 27.1 °C | 150.62 mm |
| June | 18.9 °C | 30.4 °C | 113.54 mm |
| July | 20.6 °C | 31.9 °C | 120.14 mm |
| August | 20.4 °C | 32.3 °C | 115.06 mm |
| September | 16.4 °C | 29.2 °C | 99.57 mm |
| October | 9.8 °C | 23.3 °C | 99.57 mm |
| November | 3.8 °C | 16.9 °C | 112.27 mm |
| December | 0.7 °C | 11.7 °C | 163.07 mm |
| Annual | 9.9 °C | 22.2 °C | 1528.58 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |