Weather information for the Gallup area is provided below. Average temperatures, climate details and current forecasts are included.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | ||
| Avg. High | 45 | 50 | 57 | 65 | 75 | 86 | 89 | 86 | 80 | 69 | 55 | 46 | |
| Avg. Low | 11 | 16 | 20 | 24 | 33 | 42 | 51 | 50 | 42 | 29 | 18 | 11 | |
| Precipitation | 0.8 | 0.7 | 0.9 | 0.5 | 0.6 | 0.5 | 1.6 | 2.0 | 1.1 | 1.2 | 1.0 | 0.7 | |


