Dexter, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 45.7 °F (low) to 77.3 °F (high). Annual precipitation averages 12.2 Inches. Dexter 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 | 25.0 °F | 56.9 °F | 0.38 in. |
| February | 29.0 °F | 62.2 °F | 0.33 in. |
| March | 36.3 °F | 70.3 °F | 0.51 in. |
| April | 43.7 °F | 78.6 °F | 0.63 in. |
| May | 54.0 °F | 87.0 °F | 1.15 in. |
| June | 63.5 °F | 95.7 °F | 1.1 in. |
| July | 67.5 °F | 95.7 °F | 1.91 in. |
| August | 66.0 °F | 94.1 °F | 1.76 in. |
| September | 58.3 °F | 87.0 °F | 1.93 in. |
| October | 45.9 °F | 77.6 °F | 1.37 in. |
| November | 33.3 °F | 65.5 °F | 0.53 in. |
| December | 25.6 °F | 56.5 °F | 0.55 in. |
| Annual | 45.7 °F | 77.3 °F | 12.15 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 |