Howard, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Annual precipitation averages 282.2 Millimeters. Howard is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.7 °C | 6.2 °C | 9.91 mm |
| February | -8.1 °C | 7.2 °C | 11.68 mm |
| March | -4.4 °C | 11.8 °C | 24.13 mm |
| April | -1.4 °C | 16.1 °C | 31.24 mm |
| May | 3.3 °C | 21.3 °C | 29.97 mm |
| June | 7.8 °C | 27.4 °C | 17.78 mm |
| July | 11.1 °C | 29.7 °C | 41.4 mm |
| August | 10.2 °C | 28.4 °C | 44.7 mm |
| September | 5.8 °C | 25 °C | 22.35 mm |
| October | -0.3 °C | 18.8 °C | 24.89 mm |
| November | -5.3 °C | 11.2 °C | 11.43 mm |
| December | -9.6 °C | 5.9 °C | 12.7 mm |
| Annual | -0 °C | 17.4 °C | 282.18 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |