Wesson, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.8 °F (low) to 76.5 °F (high). Annual precipitation averages 61.1 Inches. Wesson 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 | 37.0 °F | 58.5 °F | 6.0 in. |
| February | 39.6 °F | 62.7 °F | 5.84 in. |
| March | 45.8 °F | 70.0 °F | 5.78 in. |
| April | 52.6 °F | 76.7 °F | 5.5 in. |
| May | 61.1 °F | 83.5 °F | 4.49 in. |
| June | 68.4 °F | 89.3 °F | 4.93 in. |
| July | 70.6 °F | 91.1 °F | 5.57 in. |
| August | 70.0 °F | 91.6 °F | 5.09 in. |
| September | 64.5 °F | 87.4 °F | 4.04 in. |
| October | 53.1 °F | 78.8 °F | 3.73 in. |
| November | 44.0 °F | 68.1 °F | 4.51 in. |
| December | 38.9 °F | 60.4 °F | 5.58 in. |
| Annual | 53.8 °F | 76.5 °F | 61.06 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 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |