La Mesilla, New Mexico has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.1 °C (low) to 20.9 °C (high). Annual precipitation averages 261.6 Millimeters. 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 | -8 °C | 8.5 °C | 11.68 mm |
| February | -5.9 °C | 11.3 °C | 9.14 mm |
| March | -2.8 °C | 16.6 °C | 18.54 mm |
| April | 1 °C | 20.8 °C | 14.48 mm |
| May | 5.5 °C | 25.6 °C | 17.78 mm |
| June | 10.2 °C | 31.3 °C | 16.26 mm |
| July | 14.2 °C | 32.6 °C | 36.32 mm |
| August | 13.1 °C | 31.1 °C | 40.39 mm |
| September | 8.4 °C | 27.8 °C | 29.72 mm |
| October | 1.4 °C | 21.8 °C | 29.72 mm |
| November | -4.5 °C | 14.3 °C | 20.07 mm |
| December | -7.8 °C | 8.5 °C | 17.53 mm |
| Annual | 2.1 °C | 20.9 °C | 261.63 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |