Clayton, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4 °C (low) to 20.2 °C (high). Annual precipitation averages 428 Millimeters. Clayton is located in USDA Plant Hardiness Zone 6b. 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 | -6.4 °C | 9.3 °C | 12.19 mm |
| February | -5.5 °C | 10.9 °C | 8.64 mm |
| March | -1.7 °C | 15.4 °C | 24.89 mm |
| April | 2.2 °C | 19.3 °C | 30.48 mm |
| May | 7.8 °C | 24.3 °C | 45.97 mm |
| June | 13.2 °C | 29.8 °C | 53.34 mm |
| July | 15.8 °C | 31.8 °C | 74.68 mm |
| August | 15.1 °C | 30.3 °C | 80.01 mm |
| September | 11 °C | 26.8 °C | 38.61 mm |
| October | 4.2 °C | 20.9 °C | 30.48 mm |
| November | -1.9 °C | 14.3 °C | 15.49 mm |
| December | -6.2 °C | 9.1 °C | 13.21 mm |
| Annual | 4 °C | 20.2 °C | 427.99 mm |
| 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |