Fort Carson, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 35.7 °F (low) to 63.3 °F (high). Annual precipitation averages 17.5 Inches. Fort Carson 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.5 °F | 44.0 °F | 0.37 in. |
| February | 18.8 °F | 45.6 °F | 0.48 in. |
| March | 25.9 °F | 54.0 °F | 1.07 in. |
| April | 32.6 °F | 59.5 °F | 1.57 in. |
| May | 42.2 °F | 68.9 °F | 1.85 in. |
| June | 51.5 °F | 80.8 °F | 2.13 in. |
| July | 57.6 °F | 86.5 °F | 3.28 in. |
| August | 55.9 °F | 83.5 °F | 3.7 in. |
| September | 47.5 °F | 76.9 °F | 1.34 in. |
| October | 35.6 °F | 63.8 °F | 0.95 in. |
| November | 25.3 °F | 52.4 °F | 0.43 in. |
| December | 18.0 °F | 43.9 °F | 0.35 in. |
| Annual | 35.7 °F | 63.3 °F | 17.52 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 |