Lake Arthur, New Mexico has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 8 °C (low) to 25.4 °C (high). Annual precipitation averages 292.1 Millimeters. Lake Arthur is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.3 °C | 14.2 °C | 9.14 mm |
| February | -1.1 °C | 17.1 °C | 7.11 mm |
| March | 2.8 °C | 21.6 °C | 12.19 mm |
| April | 6.9 °C | 26.2 °C | 10.67 mm |
| May | 12.6 °C | 30.8 °C | 28.7 mm |
| June | 17.8 °C | 35.5 °C | 24.38 mm |
| July | 20 °C | 35.4 °C | 46.48 mm |
| August | 19.2 °C | 34.6 °C | 39.62 mm |
| September | 14.9 °C | 30.8 °C | 54.1 mm |
| October | 8.1 °C | 25.6 °C | 31.24 mm |
| November | 1.2 °C | 18.9 °C | 14.22 mm |
| December | -2.9 °C | 14 °C | 14.22 mm |
| Annual | 8 °C | 25.4 °C | 292.07 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BWk - Cold Desert Climate |