Stonewall, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.2 °F (low) to 77.9 °F (high). Annual precipitation averages 32.2 Inches. Stonewall 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 | 36.1 °F | 60.6 °F | 1.94 in. |
| February | 39.6 °F | 64.1 °F | 1.9 in. |
| March | 46.7 °F | 70.8 °F | 2.59 in. |
| April | 53.3 °F | 77.9 °F | 2.37 in. |
| May | 62.4 °F | 84.1 °F | 4.35 in. |
| June | 68.9 °F | 90.6 °F | 3.07 in. |
| July | 70.8 °F | 93.3 °F | 2.16 in. |
| August | 70.6 °F | 94.7 °F | 2.32 in. |
| September | 64.6 °F | 88.3 °F | 3.52 in. |
| October | 55.0 °F | 79.7 °F | 3.28 in. |
| November | 44.8 °F | 68.8 °F | 2.62 in. |
| December | 37.3 °F | 61.7 °F | 2.06 in. |
| Annual | 54.2 °F | 77.9 °F | 32.18 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 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 |