Black Hawk, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 28.1 °F (low) to 55.3 °F (high). Annual precipitation averages 20.5 Inches. Black Hawk is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.4 °F | 37.6 °F | 0.78 in. |
| February | 14.5 °F | 38.6 °F | 0.95 in. |
| March | 19.9 °F | 45.5 °F | 1.74 in. |
| April | 24.4 °F | 50.9 °F | 2.62 in. |
| May | 33.0 °F | 59.7 °F | 2.69 in. |
| June | 40.1 °F | 71.4 °F | 1.95 in. |
| July | 46.5 °F | 77.4 °F | 2.72 in. |
| August | 44.5 °F | 75.1 °F | 2.22 in. |
| September | 37.5 °F | 68.5 °F | 1.74 in. |
| October | 28.9 °F | 56.6 °F | 1.28 in. |
| November | 19.9 °F | 45.4 °F | 0.97 in. |
| December | 14.0 °F | 37.4 °F | 0.82 in. |
| Annual | 28.1 °F | 55.3 °F | 20.48 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 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 | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |