Van Horn, Texas has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 47.5 °F (low) to 77.7 °F (high). Annual precipitation averages 9.8 Inches. Van Horn is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.9 °F | 59.6 °F | 0.42 in. |
| February | 32.3 °F | 64.0 °F | 0.43 in. |
| March | 38.6 °F | 71.5 °F | 0.21 in. |
| April | 46.1 °F | 79.2 °F | 0.24 in. |
| May | 55.3 °F | 86.7 °F | 0.54 in. |
| June | 64.1 °F | 94.2 °F | 0.83 in. |
| July | 66.6 °F | 93.4 °F | 1.95 in. |
| August | 65.4 °F | 92.0 °F | 1.8 in. |
| September | 59.0 °F | 86.2 °F | 1.53 in. |
| October | 48.1 °F | 78.8 °F | 0.9 in. |
| November | 35.9 °F | 67.7 °F | 0.43 in. |
| December | 29.2 °F | 58.9 °F | 0.47 in. |
| Annual | 47.5 °F | 77.7 °F | 9.75 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWk - Cold Desert Climate |