San Antonio, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.6 °C (low) to 24.6 °C (high). Annual precipitation averages 223 Millimeters. San Antonio 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 | -6.1 °C | 12.3 °C | 7.37 mm |
| February | -3.9 °C | 15.8 °C | 8.13 mm |
| March | 0.5 °C | 20.2 °C | 8.13 mm |
| April | 3.2 °C | 25.2 °C | 8.64 mm |
| May | 8.2 °C | 29.9 °C | 10.41 mm |
| June | 12.9 °C | 35.4 °C | 10.67 mm |
| July | 16.3 °C | 35.6 °C | 41.66 mm |
| August | 15.6 °C | 34.2 °C | 43.69 mm |
| September | 11.3 °C | 31.2 °C | 33.78 mm |
| October | 4.1 °C | 25.5 °C | 20.83 mm |
| November | -0.9 °C | 17.6 °C | 12.95 mm |
| December | -5.9 °C | 11.9 °C | 16.76 mm |
| Annual | 4.6 °C | 24.6 °C | 223.02 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |