Hillsboro, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 42 °F (low) to 73.7 °F (high). Annual precipitation averages 10.7 Inches. Hillsboro is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.8 °F | 54.4 °F | 0.61 in. |
| February | 28.1 °F | 59.1 °F | 0.45 in. |
| March | 33.4 °F | 66.2 °F | 0.39 in. |
| April | 39.5 °F | 74.0 °F | 0.35 in. |
| May | 47.4 °F | 82.4 °F | 0.3 in. |
| June | 56.4 °F | 92.0 °F | 0.71 in. |
| July | 61.8 °F | 91.5 °F | 2.04 in. |
| August | 60.2 °F | 88.9 °F | 1.56 in. |
| September | 53.4 °F | 83.8 °F | 1.78 in. |
| October | 42.2 °F | 75.3 °F | 1.02 in. |
| November | 31.6 °F | 63.2 °F | 0.67 in. |
| December | 25.1 °F | 54.0 °F | 0.84 in. |
| Annual | 42 °F | 73.7 °F | 10.72 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |