Pearsall, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 58.1 °F (low) to 83 °F (high). Annual precipitation averages 24 Inches. Pearsall is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.4 °F | 65.8 °F | 1.25 in. |
| February | 44.3 °F | 70.2 °F | 1.21 in. |
| March | 51.5 °F | 76.8 °F | 2.04 in. |
| April | 57.7 °F | 83.3 °F | 1.68 in. |
| May | 66.1 °F | 89.5 °F | 3.24 in. |
| June | 71.6 °F | 95.1 °F | 2.69 in. |
| July | 73.0 °F | 97.5 °F | 1.67 in. |
| August | 73.1 °F | 98.4 °F | 1.8 in. |
| September | 68.5 °F | 92.5 °F | 3.42 in. |
| October | 59.6 °F | 85.2 °F | 2.3 in. |
| November | 49.8 °F | 74.3 °F | 1.51 in. |
| December | 42.0 °F | 66.9 °F | 1.19 in. |
| Annual | 58.1 °F | 83 °F | 24 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |