Belen, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 40.2 °F (low) to 74 °F (high). Annual precipitation averages 9.3 Inches. Belen is located in USDA Plant Hardiness Zone 7a. 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 | 20.3 °F | 52.0 °F | 0.58 in. |
| February | 24.4 °F | 58.2 °F | 0.38 in. |
| March | 31.3 °F | 66.4 °F | 0.57 in. |
| April | 38.5 °F | 74.1 °F | 0.61 in. |
| May | 47.2 °F | 83.2 °F | 0.58 in. |
| June | 56.5 °F | 93.1 °F | 0.48 in. |
| July | 62.6 °F | 94.4 °F | 1.68 in. |
| August | 61.0 °F | 92.0 °F | 1.3 in. |
| September | 52.3 °F | 85.9 °F | 1.12 in. |
| October | 39.6 °F | 75.1 °F | 0.98 in. |
| November | 27.8 °F | 61.8 °F | 0.47 in. |
| December | 20.7 °F | 51.2 °F | 0.58 in. |
| Annual | 40.2 °F | 74 °F | 9.33 in. |
| 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |