Clifton, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 40.7 °F (low) to 66.4 °F (high). Annual precipitation averages 9.4 Inches. Clifton 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 | 19.4 °F | 39.0 °F | 0.66 in. |
| February | 25.1 °F | 46.7 °F | 0.55 in. |
| March | 32.5 °F | 58.2 °F | 0.75 in. |
| April | 38.9 °F | 65.3 °F | 0.96 in. |
| May | 48.1 °F | 75.6 °F | 0.85 in. |
| June | 57.2 °F | 87.7 °F | 0.48 in. |
| July | 63.6 °F | 92.8 °F | 0.67 in. |
| August | 61.7 °F | 90.2 °F | 0.88 in. |
| September | 52.8 °F | 81.6 °F | 1.19 in. |
| October | 40.5 °F | 67.5 °F | 1.17 in. |
| November | 29.1 °F | 52.6 °F | 0.61 in. |
| December | 20.0 °F | 39.5 °F | 0.63 in. |
| Annual | 40.7 °F | 66.4 °F | 9.4 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 |