Prewitt, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.5 °F (low) to 66 °F (high). Annual precipitation averages 10.5 Inches. Prewitt 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 | 17.1 °F | 45.0 °F | 0.53 in. |
| February | 20.9 °F | 49.3 °F | 0.51 in. |
| March | 24.9 °F | 56.7 °F | 0.51 in. |
| April | 31.4 °F | 64.6 °F | 0.54 in. |
| May | 39.8 °F | 73.4 °F | 0.56 in. |
| June | 48.6 °F | 84.9 °F | 0.5 in. |
| July | 55.4 °F | 86.8 °F | 1.75 in. |
| August | 53.8 °F | 84.2 °F | 2.19 in. |
| September | 46.3 °F | 78.5 °F | 1.27 in. |
| October | 34.4 °F | 68.0 °F | 0.88 in. |
| November | 24.2 °F | 54.9 °F | 0.54 in. |
| December | 17.3 °F | 45.5 °F | 0.69 in. |
| Annual | 34.5 °F | 66 °F | 10.47 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 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 |