Hamilton, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.3 °F (low) to 74.4 °F (high). Annual precipitation averages 56.5 Inches. Hamilton 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 | 32.5 °F | 53.7 °F | 5.19 in. |
| February | 35.5 °F | 58.4 °F | 5.35 in. |
| March | 42.4 °F | 66.8 °F | 5.13 in. |
| April | 50.2 °F | 74.8 °F | 5.54 in. |
| May | 59.5 °F | 82.4 °F | 4.86 in. |
| June | 67.4 °F | 88.9 °F | 4.4 in. |
| July | 70.7 °F | 91.7 °F | 5.09 in. |
| August | 69.6 °F | 91.5 °F | 4.01 in. |
| September | 62.8 °F | 86.6 °F | 3.46 in. |
| October | 50.7 °F | 76.9 °F | 3.51 in. |
| November | 39.8 °F | 64.8 °F | 4.28 in. |
| December | 34.9 °F | 56.2 °F | 5.66 in. |
| Annual | 51.3 °F | 74.4 °F | 56.48 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 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |