Grant, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.1 °F (low) to 69.4 °F (high). Annual precipitation averages 58.8 Inches. Grant 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 | 30.0 °F | 48.5 °F | 5.61 in. |
| February | 33.2 °F | 53.0 °F | 5.61 in. |
| March | 40.0 °F | 61.4 °F | 5.52 in. |
| April | 48.1 °F | 69.8 °F | 5.21 in. |
| May | 56.7 °F | 77.2 °F | 4.78 in. |
| June | 64.8 °F | 84.2 °F | 4.81 in. |
| July | 67.5 °F | 87.0 °F | 4.58 in. |
| August | 66.6 °F | 86.5 °F | 4.02 in. |
| September | 60.5 °F | 81.7 °F | 4.28 in. |
| October | 49.0 °F | 71.7 °F | 3.66 in. |
| November | 38.6 °F | 60.1 °F | 4.77 in. |
| December | 33.7 °F | 51.7 °F | 5.92 in. |
| Annual | 49.1 °F | 69.4 °F | 58.77 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 |