Keenesburg, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.7 °F (low) to 64.5 °F (high). Annual precipitation averages 14.1 Inches. Keenesburg 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 | 14.5 °F | 42.5 °F | 0.39 in. |
| February | 16.9 °F | 44.5 °F | 0.38 in. |
| March | 25.5 °F | 55.4 °F | 0.94 in. |
| April | 32.6 °F | 61.9 °F | 1.73 in. |
| May | 42.7 °F | 70.8 °F | 2.48 in. |
| June | 52.2 °F | 83.1 °F | 1.66 in. |
| July | 58.0 °F | 89.4 °F | 1.6 in. |
| August | 55.6 °F | 87.1 °F | 1.6 in. |
| September | 46.8 °F | 79.4 °F | 1.2 in. |
| October | 33.9 °F | 65.5 °F | 1.08 in. |
| November | 23.3 °F | 52.4 °F | 0.6 in. |
| December | 14.5 °F | 42.0 °F | 0.41 in. |
| Annual | 34.7 °F | 64.5 °F | 14.07 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 5a : -20°F to -15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |