Kirk, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 36.3 °F (low) to 64.8 °F (high). Annual precipitation averages 17.7 Inches. Kirk is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.1 °F | 42.9 °F | 0.39 in. |
| February | 17.9 °F | 44.8 °F | 0.4 in. |
| March | 25.5 °F | 55.0 °F | 0.79 in. |
| April | 33.3 °F | 62.2 °F | 1.83 in. |
| May | 43.9 °F | 71.8 °F | 2.6 in. |
| June | 54.4 °F | 83.6 °F | 2.81 in. |
| July | 60.0 °F | 89.0 °F | 3.0 in. |
| August | 58.0 °F | 86.8 °F | 2.5 in. |
| September | 49.0 °F | 79.8 °F | 1.26 in. |
| October | 35.8 °F | 65.9 °F | 1.2 in. |
| November | 24.8 °F | 52.9 °F | 0.48 in. |
| December | 16.9 °F | 43.1 °F | 0.41 in. |
| Annual | 36.3 °F | 64.8 °F | 17.67 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |