Alamillo, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 5.4 °C (low) to 23.5 °C (high). Annual precipitation averages 226.1 Millimeters. Alamillo is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.8 °C | 11.4 °C | 7.87 mm |
| February | -3.4 °C | 14.9 °C | 6.35 mm |
| March | 0.6 °C | 19.3 °C | 11.94 mm |
| April | 4.3 °C | 23.6 °C | 9.91 mm |
| May | 9.4 °C | 28.8 °C | 12.45 mm |
| June | 14.6 °C | 34.2 °C | 10.16 mm |
| July | 17.7 °C | 34.7 °C | 38.1 mm |
| August | 16.7 °C | 33.2 °C | 46.74 mm |
| September | 12.4 °C | 30 °C | 37.85 mm |
| October | 5.1 °C | 24 °C | 21.34 mm |
| November | -1.3 °C | 16.8 °C | 11.18 mm |
| December | -5.7 °C | 11.1 °C | 12.19 mm |
| Annual | 5.4 °C | 23.5 °C | 226.08 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |