Dumas, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 42.4 °F (low) to 71 °F (high). Annual precipitation averages 16.1 Inches. Dumas 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 | 22.0 °F | 49.8 °F | 0.4 in. |
| February | 24.4 °F | 53.6 °F | 0.34 in. |
| March | 31.4 °F | 62.4 °F | 0.89 in. |
| April | 39.4 °F | 69.8 °F | 1.19 in. |
| May | 50.0 °F | 79.3 °F | 1.78 in. |
| June | 60.1 °F | 88.8 °F | 2.32 in. |
| July | 64.8 °F | 92.4 °F | 2.65 in. |
| August | 63.4 °F | 90.5 °F | 2.49 in. |
| September | 55.5 °F | 83.2 °F | 1.19 in. |
| October | 42.9 °F | 71.9 °F | 1.67 in. |
| November | 31.1 °F | 59.8 °F | 0.49 in. |
| December | 23.2 °F | 49.9 °F | 0.65 in. |
| Annual | 42.4 °F | 71 °F | 16.06 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |