Big Wells, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 59.6 °F (low) to 84.4 °F (high). Annual precipitation averages 21.7 Inches. Big Wells 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 | 41.6 °F | 67.0 °F | 1.05 in. |
| February | 45.8 °F | 71.7 °F | 0.86 in. |
| March | 53.2 °F | 78.5 °F | 1.89 in. |
| April | 59.5 °F | 85.7 °F | 1.51 in. |
| May | 67.7 °F | 91.8 °F | 3.31 in. |
| June | 73.1 °F | 97.1 °F | 2.34 in. |
| July | 74.3 °F | 98.7 °F | 1.46 in. |
| August | 74.6 °F | 99.3 °F | 1.85 in. |
| September | 70.0 °F | 93.3 °F | 3.07 in. |
| October | 60.9 °F | 86.0 °F | 2.07 in. |
| November | 51.0 °F | 75.2 °F | 1.23 in. |
| December | 42.9 °F | 67.9 °F | 1.04 in. |
| Annual | 59.6 °F | 84.4 °F | 21.68 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 9a : 20°F to 25°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |