Hamilton, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.1 °F (low) to 72.9 °F (high). Annual precipitation averages 61.6 Inches. Hamilton is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.6 °F | 51.7 °F | 5.61 in. |
| February | 33.1 °F | 56.6 °F | 5.77 in. |
| March | 39.8 °F | 65.5 °F | 5.3 in. |
| April | 47.9 °F | 74.0 °F | 5.79 in. |
| May | 57.3 °F | 80.8 °F | 5.82 in. |
| June | 65.3 °F | 87.4 °F | 5.0 in. |
| July | 68.6 °F | 90.3 °F | 5.16 in. |
| August | 67.9 °F | 90.5 °F | 4.41 in. |
| September | 60.8 °F | 85.6 °F | 4.11 in. |
| October | 48.7 °F | 75.0 °F | 3.66 in. |
| November | 37.8 °F | 63.3 °F | 4.65 in. |
| December | 32.8 °F | 54.5 °F | 6.34 in. |
| Annual | 49.1 °F | 72.9 °F | 61.62 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |