Grand Junction, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 40.7 °F (low) to 66.8 °F (high). Annual precipitation averages 9.2 Inches. Grand Junction is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.2 °F | 39.1 °F | 0.59 in. |
| February | 25.0 °F | 47.0 °F | 0.58 in. |
| March | 32.5 °F | 58.6 °F | 0.78 in. |
| April | 38.9 °F | 65.8 °F | 0.92 in. |
| May | 48.2 °F | 76.2 °F | 0.87 in. |
| June | 56.9 °F | 88.4 °F | 0.47 in. |
| July | 63.6 °F | 93.7 °F | 0.77 in. |
| August | 61.9 °F | 90.5 °F | 0.79 in. |
| September | 52.4 °F | 82.0 °F | 1.22 in. |
| October | 40.5 °F | 67.8 °F | 1.09 in. |
| November | 29.0 °F | 52.8 °F | 0.6 in. |
| December | 19.8 °F | 39.8 °F | 0.51 in. |
| Annual | 40.7 °F | 66.8 °F | 9.19 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |