Alamo, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3.1 °C (low) to 20.5 °C (high). Annual precipitation averages 268.7 Millimeters. Alamo is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.9 °C | 9.2 °C | 11.94 mm |
| February | -5 °C | 11.9 °C | 8.64 mm |
| March | -1.9 °C | 16 °C | 12.7 mm |
| April | 1.4 °C | 20.3 °C | 11.18 mm |
| May | 6.4 °C | 25.3 °C | 15.24 mm |
| June | 11.6 °C | 30.9 °C | 14.22 mm |
| July | 14.7 °C | 31.3 °C | 52.83 mm |
| August | 13.8 °C | 29.8 °C | 51.82 mm |
| September | 9.7 °C | 26.9 °C | 38.86 mm |
| October | 3.3 °C | 21.2 °C | 22.86 mm |
| November | -2.9 °C | 14.5 °C | 12.19 mm |
| December | -6.8 °C | 9.2 °C | 16.26 mm |
| Annual | 3.1 °C | 20.5 °C | 268.74 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |