Hooper, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 24.6 °F (low) to 58.8 °F (high). Annual precipitation averages 7.8 Inches. Hooper is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.8 °F | 33.1 °F | 0.33 in. |
| February | 7.5 °F | 39.5 °F | 0.27 in. |
| March | 17.4 °F | 50.8 °F | 0.55 in. |
| April | 24.5 °F | 58.5 °F | 0.65 in. |
| May | 33.8 °F | 67.5 °F | 0.7 in. |
| June | 40.8 °F | 77.6 °F | 0.48 in. |
| July | 46.6 °F | 80.5 °F | 1.22 in. |
| August | 44.5 °F | 78.9 °F | 1.21 in. |
| September | 37.0 °F | 73.5 °F | 0.96 in. |
| October | 25.4 °F | 62.3 °F | 0.67 in. |
| November | 13.7 °F | 48.3 °F | 0.4 in. |
| December | 2.7 °F | 34.8 °F | 0.33 in. |
| Annual | 24.6 °F | 58.8 °F | 7.77 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |