Stonewall, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.5 °F (low) to 76.5 °F (high). Annual precipitation averages 53.6 Inches. Stonewall 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 | 35.9 °F | 57.1 °F | 4.83 in. |
| February | 39.3 °F | 61.5 °F | 4.52 in. |
| March | 46.1 °F | 68.9 °F | 5.14 in. |
| April | 53.3 °F | 76.5 °F | 5.02 in. |
| May | 62.7 °F | 83.6 °F | 4.63 in. |
| June | 70.0 °F | 90.2 °F | 4.53 in. |
| July | 72.9 °F | 93.5 °F | 3.8 in. |
| August | 72.1 °F | 94.1 °F | 3.34 in. |
| September | 65.5 °F | 88.8 °F | 3.57 in. |
| October | 54.1 °F | 78.4 °F | 4.7 in. |
| November | 44.1 °F | 67.1 °F | 4.3 in. |
| December | 37.7 °F | 58.8 °F | 5.23 in. |
| Annual | 54.5 °F | 76.5 °F | 53.61 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |