Boys Ranch, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 43.4 °F (low) to 73.1 °F (high). Annual precipitation averages 18.6 Inches. Boys Ranch is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.0 °F | 52.5 °F | 0.5 in. |
| February | 25.1 °F | 56.0 °F | 0.39 in. |
| March | 33.0 °F | 64.9 °F | 1.05 in. |
| April | 41.4 °F | 72.6 °F | 1.26 in. |
| May | 51.9 °F | 80.9 °F | 1.82 in. |
| June | 62.3 °F | 90.2 °F | 2.76 in. |
| July | 66.3 °F | 94.4 °F | 2.71 in. |
| August | 64.8 °F | 92.3 °F | 3.18 in. |
| September | 57.2 °F | 84.4 °F | 1.57 in. |
| October | 43.8 °F | 73.8 °F | 1.92 in. |
| November | 30.5 °F | 62.5 °F | 0.64 in. |
| December | 22.4 °F | 52.8 °F | 0.75 in. |
| Annual | 43.4 °F | 73.1 °F | 18.55 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |