Vernon, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 36.3 °F (low) to 64.9 °F (high). Annual precipitation averages 18.2 Inches. Vernon 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 | 16.1 °F | 42.8 °F | 0.38 in. |
| February | 17.8 °F | 44.8 °F | 0.42 in. |
| March | 25.4 °F | 54.9 °F | 0.86 in. |
| April | 33.6 °F | 62.6 °F | 1.79 in. |
| May | 44.3 °F | 71.9 °F | 2.72 in. |
| June | 54.6 °F | 83.6 °F | 2.46 in. |
| July | 60.4 °F | 89.2 °F | 3.24 in. |
| August | 58.2 °F | 87.0 °F | 2.96 in. |
| September | 48.8 °F | 79.9 °F | 1.18 in. |
| October | 35.2 °F | 66.3 °F | 1.3 in. |
| November | 24.5 °F | 53.0 °F | 0.48 in. |
| December | 16.3 °F | 43.0 °F | 0.39 in. |
| Annual | 36.3 °F | 64.9 °F | 18.18 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |