Weather information for the Grants area is provided below. Average temperatures, climate details and current forecasts are included.
Climate
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | ||
| Avg. High | 43 | 47 | 54 | 63 | 72 | 83 | 85 | 82 | 76 | 66 | 53 | 44 | |
| Avg. Low | 18 | 22 | 26 | 32 | 40 | 50 | 56 | 54 | 47 | 37 | 27 | 20 | |
| Precipitation | 0.6 | 0.6 | 0.7 | 0.5 | 0.6 | 0.6 | 1.6 | 2.3 | 1.4 | 1.0 | 0.7 | 0.7 | |

