Maxwell, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.8 °C (low) to 19.9 °C (high). Annual precipitation averages 371.1 Millimeters. Maxwell is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.7 °C | 9.2 °C | 9.91 mm |
| February | -8.4 °C | 10.8 °C | 6.6 mm |
| March | -4.5 °C | 15.4 °C | 19.56 mm |
| April | -0.5 °C | 19.2 °C | 22.61 mm |
| May | 4.7 °C | 24.1 °C | 43.69 mm |
| June | 9.8 °C | 29.1 °C | 49.28 mm |
| July | 12.4 °C | 30.7 °C | 61.21 mm |
| August | 11.8 °C | 29.7 °C | 69.6 mm |
| September | 7.7 °C | 26.6 °C | 44.96 mm |
| October | 0.8 °C | 21.2 °C | 24.64 mm |
| November | -5.3 °C | 14 °C | 10.16 mm |
| December | -9.7 °C | 8.7 °C | 8.89 mm |
| Annual | 0.8 °C | 19.9 °C | 371.11 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |