La Mesilla, New Mexico has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.7 °F (low) to 69.5 °F (high). Annual precipitation averages 10.3 Inches. La Mesilla is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.6 °F | 47.3 °F | 0.46 in. |
| February | 21.4 °F | 52.4 °F | 0.36 in. |
| March | 27.0 °F | 61.8 °F | 0.73 in. |
| April | 33.8 °F | 69.4 °F | 0.57 in. |
| May | 41.9 °F | 78.1 °F | 0.7 in. |
| June | 50.4 °F | 88.4 °F | 0.64 in. |
| July | 57.6 °F | 90.7 °F | 1.43 in. |
| August | 55.6 °F | 87.9 °F | 1.59 in. |
| September | 47.1 °F | 82.0 °F | 1.17 in. |
| October | 34.6 °F | 71.3 °F | 1.17 in. |
| November | 23.9 °F | 57.7 °F | 0.79 in. |
| December | 17.9 °F | 47.3 °F | 0.69 in. |
| Annual | 35.7 °F | 69.5 °F | 10.3 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |