Holyoke, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 35.9 °F (low) to 64.8 °F (high). Annual precipitation averages 17.6 Inches. Holyoke 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 | 15.6 °F | 42.5 °F | 0.35 in. |
| February | 17.1 °F | 44.6 °F | 0.46 in. |
| March | 25.1 °F | 54.7 °F | 0.88 in. |
| April | 33.2 °F | 62.3 °F | 1.96 in. |
| May | 44.2 °F | 71.7 °F | 2.79 in. |
| June | 54.8 °F | 83.6 °F | 2.68 in. |
| July | 60.2 °F | 89.2 °F | 2.8 in. |
| August | 57.9 °F | 87.2 °F | 2.14 in. |
| September | 48.2 °F | 79.8 °F | 1.38 in. |
| October | 34.9 °F | 65.8 °F | 1.21 in. |
| November | 24.1 °F | 53.3 °F | 0.54 in. |
| December | 15.8 °F | 42.7 °F | 0.41 in. |
| Annual | 35.9 °F | 64.8 °F | 17.6 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 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |