Sierra Blanca, Texas has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 8.3 °C (low) to 25.1 °C (high). Annual precipitation averages 262.4 Millimeters. 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 | -2.2 °C | 14.9 °C | 10.92 mm |
| February | -0.4 °C | 17.6 °C | 11.43 mm |
| March | 3 °C | 21.6 °C | 9.91 mm |
| April | 7.1 °C | 26.2 °C | 6.35 mm |
| May | 12.3 °C | 30.3 °C | 11.18 mm |
| June | 17.1 °C | 34.7 °C | 24.13 mm |
| July | 19.1 °C | 33.8 °C | 54.61 mm |
| August | 18.3 °C | 32.8 °C | 49.28 mm |
| September | 15.3 °C | 30 °C | 37.08 mm |
| October | 8.5 °C | 25.8 °C | 22.61 mm |
| November | 1.8 °C | 19.4 °C | 12.19 mm |
| December | -0.8 °C | 14.6 °C | 12.7 mm |
| Annual | 8.3 °C | 25.1 °C | 262.39 mm |
| 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 : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWk - Cold Desert Climate |