Wiley, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 37.3 °F (low) to 68.5 °F (high). Annual precipitation averages 14.8 Inches. Wiley is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.7 °F | 45.3 °F | 0.31 in. |
| February | 18.0 °F | 48.7 °F | 0.37 in. |
| March | 26.3 °F | 59.4 °F | 0.69 in. |
| April | 35.0 °F | 67.1 °F | 1.36 in. |
| May | 45.9 °F | 76.6 °F | 1.78 in. |
| June | 57.1 °F | 87.9 °F | 2.14 in. |
| July | 62.5 °F | 92.6 °F | 2.7 in. |
| August | 60.6 °F | 89.9 °F | 2.48 in. |
| September | 51.3 °F | 82.9 °F | 1.02 in. |
| October | 36.4 °F | 69.9 °F | 1.07 in. |
| November | 24.1 °F | 56.3 °F | 0.44 in. |
| December | 15.4 °F | 45.8 °F | 0.42 in. |
| Annual | 37.3 °F | 68.5 °F | 14.78 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |