San Luis, New Mexico has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.1 °F (low) to 67.6 °F (high). Annual precipitation averages 10.8 Inches. San Luis is located in USDA Plant Hardiness Zone 6b. 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 | 17.9 °F | 45.2 °F | 0.59 in. |
| February | 21.9 °F | 50.2 °F | 0.48 in. |
| March | 27.4 °F | 58.7 °F | 0.65 in. |
| April | 33.1 °F | 66.8 °F | 0.77 in. |
| May | 41.5 °F | 76.2 °F | 0.68 in. |
| June | 50.4 °F | 87.2 °F | 0.61 in. |
| July | 57.1 °F | 89.7 °F | 1.71 in. |
| August | 55.6 °F | 87.1 °F | 1.65 in. |
| September | 48.0 °F | 80.5 °F | 1.31 in. |
| October | 36.0 °F | 69.0 °F | 1.0 in. |
| November | 25.6 °F | 55.7 °F | 0.66 in. |
| December | 18.2 °F | 45.3 °F | 0.65 in. |
| Annual | 36.1 °F | 67.6 °F | 10.76 in. |
| 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |