Gallup, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.1 °C (low) to 19 °C (high). Annual precipitation averages 322.1 Millimeters. Gallup is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.8 °C | 7.2 °C | 22.86 mm |
| February | -6.4 °C | 9.6 °C | 25.15 mm |
| March | -3.9 °C | 13.8 °C | 22.35 mm |
| April | -0.8 °C | 18.1 °C | 14.99 mm |
| May | 3.8 °C | 23.1 °C | 21.59 mm |
| June | 8.6 °C | 29.7 °C | 6.6 mm |
| July | 13.1 °C | 30.9 °C | 40.64 mm |
| August | 12.4 °C | 29.5 °C | 57.66 mm |
| September | 7.9 °C | 26.2 °C | 37.59 mm |
| October | 1.1 °C | 20.3 °C | 22.86 mm |
| November | -4.8 °C | 12.8 °C | 18.29 mm |
| December | -8.7 °C | 7.3 °C | 31.5 mm |
| Annual | 1.1 °C | 19 °C | 322.08 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |