Heeney, Colorado has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 22.5 °F (low) to 53.5 °F (high). Annual precipitation averages 13.9 Inches. Heeney is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Aug. 21 - Aug. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.1 °F | 28.5 °F | 0.85 in. |
| February | 4.9 °F | 33.0 °F | 0.95 in. |
| March | 14.5 °F | 42.9 °F | 1.04 in. |
| April | 22.7 °F | 51.2 °F | 1.47 in. |
| May | 30.6 °F | 61.4 °F | 1.43 in. |
| June | 36.9 °F | 73.0 °F | 1.01 in. |
| July | 43.2 °F | 78.9 °F | 1.37 in. |
| August | 41.1 °F | 76.6 °F | 1.44 in. |
| September | 33.6 °F | 69.5 °F | 1.35 in. |
| October | 23.9 °F | 56.0 °F | 1.28 in. |
| November | 14.1 °F | 41.5 °F | 0.79 in. |
| December | 3.3 °F | 29.6 °F | 0.92 in. |
| Annual | 22.5 °F | 53.5 °F | 13.9 in. |
| Average First Frost Date | Aug. 21 - Aug. 31 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |