
| Month | Low | High |
|---|---|---|
| Jan | 15.6°F | 36.6°F |
| Feb | 22.7°F | 45.4°F |
| Mar | 31.0°F | 55.7°F |
| Apr | 37.5°F | 64.3°F |
| May | 46.4°F | 74.5°F |
| Jun | 55.3°F | 86.9°F |
| Jul | 61.4°F | 92.1°F |
| Aug | 59.7°F | 89.6°F |
| Sept | 50.4°F | 80.3°F |
| Oct | 38.6°F | 66.7°F |
| Nov | 26.3°F | 49.8°F |
| Dec | 17.5°F | 38.9°F |
Grand Junction's coldest month is January when the average temperature overnight is 15.6°F. In July, the warmest month, the average day time temperature rises to 92.1°F.

| Month | Precipitation |
|---|---|
| Jan | 0.60in. |
| Feb | 0.50in. |
| Mar | 1.00in. |
| Apr | 0.86in. |
| May | 0.98in. |
| Jun | 0.41in. |
| Jul | 0.66in. |
| Aug | 0.84in. |
| Sept | 0.91in. |
| Oct | 1.00in. |
| Nov | 0.71in. |
| Dec | 0.52in. |
The driest month in Grand Junction is June with 0.41 inches of precipitation, and with 1.00 inches March is the wettest month.