Black Hawk, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.1 °C (low) to 13 °C (high). Annual precipitation averages 520.2 Millimeters. 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 | -9.8 °C | 3.1 °C | 19.81 mm |
| February | -9.7 °C | 3.7 °C | 24.13 mm |
| March | -6.7 °C | 7.5 °C | 44.2 mm |
| April | -4.2 °C | 10.5 °C | 66.55 mm |
| May | 0.6 °C | 15.4 °C | 68.33 mm |
| June | 4.5 °C | 21.9 °C | 49.53 mm |
| July | 8.1 °C | 25.2 °C | 69.09 mm |
| August | 6.9 °C | 23.9 °C | 56.39 mm |
| September | 3.1 °C | 20.3 °C | 44.2 mm |
| October | -1.7 °C | 13.7 °C | 32.51 mm |
| November | -6.7 °C | 7.4 °C | 24.64 mm |
| December | -10 °C | 3 °C | 20.83 mm |
| Annual | -2.1 °C | 13 °C | 520.21 mm |
| 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 : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |