Vernon, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.4 °C (low) to 18.3 °C (high). Annual precipitation averages 461.8 Millimeters. 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 | -8.8 °C | 6 °C | 9.65 mm |
| February | -7.9 °C | 7.1 °C | 10.67 mm |
| March | -3.7 °C | 12.7 °C | 21.84 mm |
| April | 0.9 °C | 17 °C | 45.47 mm |
| May | 6.8 °C | 22.2 °C | 69.09 mm |
| June | 12.6 °C | 28.7 °C | 62.48 mm |
| July | 15.8 °C | 31.8 °C | 82.3 mm |
| August | 14.6 °C | 30.6 °C | 75.18 mm |
| September | 9.3 °C | 26.6 °C | 29.97 mm |
| October | 1.8 °C | 19.1 °C | 33.02 mm |
| November | -4.2 °C | 11.7 °C | 12.19 mm |
| December | -8.7 °C | 6.1 °C | 9.91 mm |
| Annual | 2.4 °C | 18.3 °C | 461.77 mm |
| 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 : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |