Penrose, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 36.5 °F (low) to 66.4 °F (high). Annual precipitation averages 11.4 Inches. Penrose is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.5 °F | 47.4 °F | 0.39 in. |
| February | 19.4 °F | 48.2 °F | 0.35 in. |
| March | 26.5 °F | 57.0 °F | 0.66 in. |
| April | 33.6 °F | 63.7 °F | 1.51 in. |
| May | 43.4 °F | 72.6 °F | 1.48 in. |
| June | 52.5 °F | 83.8 °F | 0.93 in. |
| July | 58.5 °F | 88.3 °F | 1.89 in. |
| August | 56.7 °F | 85.8 °F | 2.1 in. |
| September | 48.2 °F | 79.5 °F | 0.82 in. |
| October | 35.7 °F | 67.6 °F | 0.53 in. |
| November | 26.4 °F | 55.6 °F | 0.4 in. |
| December | 19.0 °F | 46.9 °F | 0.35 in. |
| Annual | 36.5 °F | 66.4 °F | 11.41 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |