Dalhart, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 40.6 °F (low) to 70.7 °F (high). Annual precipitation averages 16.8 Inches. Dalhart 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.5 °F | 49.7 °F | 0.6 in. |
| February | 22.9 °F | 53.5 °F | 0.44 in. |
| March | 29.8 °F | 62.1 °F | 0.97 in. |
| April | 37.7 °F | 69.6 °F | 1.24 in. |
| May | 48.3 °F | 78.9 °F | 1.89 in. |
| June | 58.6 °F | 88.8 °F | 2.18 in. |
| July | 63.2 °F | 92.2 °F | 2.18 in. |
| August | 61.7 °F | 89.9 °F | 2.76 in. |
| September | 53.9 °F | 83.3 °F | 1.38 in. |
| October | 40.7 °F | 71.7 °F | 1.84 in. |
| November | 29.0 °F | 59.5 °F | 0.56 in. |
| December | 21.1 °F | 49.5 °F | 0.71 in. |
| Annual | 40.6 °F | 70.7 °F | 16.75 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |