Attalla, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.1 °C (low) to 22.5 °C (high). Annual precipitation averages 1468.4 Millimeters. Attalla is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.3 °C | 10.9 °C | 141.99 mm |
| February | 1.3 °C | 13.4 °C | 138.43 mm |
| March | 4.9 °C | 18.1 °C | 141.99 mm |
| April | 9.2 °C | 22.9 °C | 132.33 mm |
| May | 14.3 °C | 26.9 °C | 116.33 mm |
| June | 19 °C | 30.6 °C | 126.49 mm |
| July | 20.8 °C | 32.2 °C | 116.59 mm |
| August | 20.3 °C | 31.9 °C | 103.89 mm |
| September | 16.9 °C | 29.2 °C | 103.12 mm |
| October | 10.3 °C | 23.7 °C | 88.65 mm |
| November | 3.9 °C | 17.2 °C | 116.08 mm |
| December | 1.1 °C | 12.6 °C | 142.49 mm |
| Annual | 10.1 °C | 22.5 °C | 1468.38 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |