Mendenhall, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.1 °F (low) to 76.4 °F (high). Annual precipitation averages 58.3 Inches. Mendenhall is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.5 °F | 57.9 °F | 5.76 in. |
| February | 38.2 °F | 62.2 °F | 5.54 in. |
| March | 44.8 °F | 69.7 °F | 5.66 in. |
| April | 52.1 °F | 76.7 °F | 5.6 in. |
| May | 60.8 °F | 83.5 °F | 3.86 in. |
| June | 68.1 °F | 89.6 °F | 4.71 in. |
| July | 70.6 °F | 91.7 °F | 5.35 in. |
| August | 70.0 °F | 91.6 °F | 4.77 in. |
| September | 64.3 °F | 87.4 °F | 3.74 in. |
| October | 52.4 °F | 78.5 °F | 3.12 in. |
| November | 42.4 °F | 67.6 °F | 4.59 in. |
| December | 37.6 °F | 60.1 °F | 5.61 in. |
| Annual | 53.1 °F | 76.4 °F | 58.31 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |