Folsom, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 35.3 °F (low) to 65.1 °F (high). Annual precipitation averages 16.3 Inches. Folsom is located in USDA Plant Hardiness Zone 6a. 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 | 17.3 °F | 46.3 °F | 0.47 in. |
| February | 19.2 °F | 48.7 °F | 0.38 in. |
| March | 25.6 °F | 56.3 °F | 0.92 in. |
| April | 32.3 °F | 62.7 °F | 1.16 in. |
| May | 41.5 °F | 71.9 °F | 1.8 in. |
| June | 51.1 °F | 82.1 °F | 1.7 in. |
| July | 56.2 °F | 85.3 °F | 3.0 in. |
| August | 54.8 °F | 83.3 °F | 3.09 in. |
| September | 47.5 °F | 77.2 °F | 1.66 in. |
| October | 35.6 °F | 66.8 °F | 1.1 in. |
| November | 24.8 °F | 55.2 °F | 0.53 in. |
| December | 17.4 °F | 45.9 °F | 0.5 in. |
| Annual | 35.3 °F | 65.1 °F | 16.31 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 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |