Roswell, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 44.6 °F (low) to 76.9 °F (high). Annual precipitation averages 12.4 Inches. Roswell is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.0 °F | 56.5 °F | 0.44 in. |
| February | 28.1 °F | 62.0 °F | 0.35 in. |
| March | 35.3 °F | 70.0 °F | 0.51 in. |
| April | 42.6 °F | 78.1 °F | 0.79 in. |
| May | 52.9 °F | 86.6 °F | 1.06 in. |
| June | 62.4 °F | 95.3 °F | 1.05 in. |
| July | 66.6 °F | 95.3 °F | 1.79 in. |
| August | 65.0 °F | 93.7 °F | 2.0 in. |
| September | 57.3 °F | 86.5 °F | 1.81 in. |
| October | 44.7 °F | 77.2 °F | 1.47 in. |
| November | 32.2 °F | 65.1 °F | 0.57 in. |
| December | 24.5 °F | 56.2 °F | 0.55 in. |
| Annual | 44.6 °F | 76.9 °F | 12.39 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |