Sierra Blanca, Texas has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 46.9 °F (low) to 77.3 °F (high). Annual precipitation averages 10.3 Inches. Sierra Blanca is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.1 °F | 58.9 °F | 0.43 in. |
| February | 31.3 °F | 63.6 °F | 0.45 in. |
| March | 37.4 °F | 70.9 °F | 0.39 in. |
| April | 44.8 °F | 79.2 °F | 0.25 in. |
| May | 54.1 °F | 86.6 °F | 0.44 in. |
| June | 62.7 °F | 94.4 °F | 0.95 in. |
| July | 66.4 °F | 92.9 °F | 2.15 in. |
| August | 65.0 °F | 91.1 °F | 1.94 in. |
| September | 59.6 °F | 86.0 °F | 1.46 in. |
| October | 47.3 °F | 78.4 °F | 0.89 in. |
| November | 35.3 °F | 67.0 °F | 0.48 in. |
| December | 30.6 °F | 58.2 °F | 0.5 in. |
| Annual | 46.9 °F | 77.3 °F | 10.33 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWk - Cold Desert Climate |