Graham, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.3 °F (low) to 71.9 °F (high). Annual precipitation averages 55.3 Inches. Graham 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 | 31.1 °F | 52.9 °F | 5.25 in. |
| February | 34.0 °F | 56.9 °F | 5.26 in. |
| March | 39.8 °F | 65.0 °F | 5.57 in. |
| April | 47.1 °F | 72.5 °F | 4.61 in. |
| May | 56.5 °F | 79.3 °F | 4.09 in. |
| June | 64.3 °F | 85.4 °F | 4.77 in. |
| July | 68.0 °F | 88.5 °F | 4.84 in. |
| August | 67.3 °F | 87.5 °F | 4.02 in. |
| September | 61.0 °F | 82.5 °F | 3.72 in. |
| October | 49.4 °F | 73.4 °F | 3.62 in. |
| November | 38.8 °F | 63.4 °F | 4.43 in. |
| December | 33.9 °F | 55.4 °F | 5.13 in. |
| Annual | 49.3 °F | 71.9 °F | 55.31 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |