Dell City, Texas has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 45.8 °F (low) to 79.8 °F (high). Annual precipitation averages 9.1 Inches. Dell City is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.7 °F | 59.9 °F | 0.28 in. |
| February | 30.6 °F | 65.5 °F | 0.33 in. |
| March | 37.1 °F | 73.0 °F | 0.4 in. |
| April | 44.3 °F | 81.7 °F | 0.2 in. |
| May | 53.9 °F | 89.9 °F | 0.7 in. |
| June | 62.7 °F | 98.4 °F | 1.0 in. |
| July | 66.2 °F | 97.1 °F | 1.67 in. |
| August | 65.2 °F | 95.4 °F | 1.16 in. |
| September | 57.9 °F | 89.8 °F | 1.47 in. |
| October | 45.4 °F | 80.6 °F | 0.94 in. |
| November | 33.6 °F | 68.1 °F | 0.46 in. |
| December | 26.5 °F | 58.6 °F | 0.47 in. |
| Annual | 45.8 °F | 79.8 °F | 9.08 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWk - Cold Desert Climate |