Sumrall, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.3 °F (low) to 77.1 °F (high). Annual precipitation averages 60.9 Inches. Sumrall is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.0 °F | 59.5 °F | 6.24 in. |
| February | 40.2 °F | 63.7 °F | 5.25 in. |
| March | 46.5 °F | 70.7 °F | 5.96 in. |
| April | 53.2 °F | 77.3 °F | 5.18 in. |
| May | 61.6 °F | 84.2 °F | 4.37 in. |
| June | 68.7 °F | 89.7 °F | 5.42 in. |
| July | 71.2 °F | 91.5 °F | 5.72 in. |
| August | 70.6 °F | 91.5 °F | 5.46 in. |
| September | 66.0 °F | 87.6 °F | 4.28 in. |
| October | 54.2 °F | 79.1 °F | 3.32 in. |
| November | 43.9 °F | 68.8 °F | 4.03 in. |
| December | 39.0 °F | 61.3 °F | 5.69 in. |
| Annual | 54.3 °F | 77.1 °F | 60.92 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 |