Hazel Green, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.9 °F (low) to 70.2 °F (high). Annual precipitation averages 58.6 Inches. Hazel Green 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 | 30.3 °F | 48.9 °F | 5.43 in. |
| February | 32.8 °F | 53.3 °F | 5.42 in. |
| March | 39.5 °F | 61.7 °F | 5.38 in. |
| April | 48.0 °F | 70.8 °F | 5.18 in. |
| May | 57.5 °F | 78.6 °F | 4.57 in. |
| June | 64.7 °F | 85.0 °F | 4.86 in. |
| July | 68.3 °F | 88.1 °F | 4.92 in. |
| August | 66.7 °F | 87.7 °F | 4.27 in. |
| September | 60.2 °F | 82.6 °F | 4.08 in. |
| October | 48.3 °F | 72.7 °F | 3.74 in. |
| November | 37.9 °F | 60.9 °F | 4.56 in. |
| December | 33.0 °F | 51.8 °F | 6.23 in. |
| Annual | 48.9 °F | 70.2 °F | 58.64 in. |
| 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 : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |