Walthall, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.7 °F (low) to 73.7 °F (high). Annual precipitation averages 57.7 Inches. Walthall 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 | 32.1 °F | 53.6 °F | 5.23 in. |
| February | 34.5 °F | 57.8 °F | 5.14 in. |
| March | 41.7 °F | 66.4 °F | 5.48 in. |
| April | 49.4 °F | 74.6 °F | 5.91 in. |
| May | 58.7 °F | 81.5 °F | 5.13 in. |
| June | 66.3 °F | 87.8 °F | 4.48 in. |
| July | 69.7 °F | 90.7 °F | 4.5 in. |
| August | 68.5 °F | 90.5 °F | 4.13 in. |
| September | 62.1 °F | 85.6 °F | 3.82 in. |
| October | 50.5 °F | 76.2 °F | 3.64 in. |
| November | 40.0 °F | 64.4 °F | 4.42 in. |
| December | 34.6 °F | 55.7 °F | 5.79 in. |
| Annual | 50.7 °F | 73.7 °F | 57.67 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |