San Mateo, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34 °F (low) to 63.7 °F (high). Annual precipitation averages 10.5 Inches. San Mateo is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.3 °F | 42.9 °F | 0.32 in. |
| February | 20.3 °F | 46.9 °F | 0.34 in. |
| March | 24.8 °F | 54.5 °F | 0.41 in. |
| April | 30.6 °F | 62.3 °F | 0.38 in. |
| May | 38.9 °F | 71.0 °F | 0.61 in. |
| June | 47.8 °F | 82.5 °F | 0.6 in. |
| July | 53.9 °F | 84.0 °F | 2.14 in. |
| August | 52.8 °F | 81.8 °F | 2.47 in. |
| September | 45.6 °F | 76.5 °F | 1.45 in. |
| October | 34.4 °F | 65.5 °F | 0.62 in. |
| November | 25.4 °F | 52.8 °F | 0.63 in. |
| December | 16.4 °F | 43.7 °F | 0.52 in. |
| Annual | 34 °F | 63.7 °F | 10.49 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |