Vernon, Arizona has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.7 °F (low) to 65.1 °F (high). Annual precipitation averages 21.7 Inches. Vernon is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.4 °F | 46.3 °F | 2.01 in. |
| February | 21.7 °F | 49.8 °F | 1.82 in. |
| March | 25.9 °F | 55.9 °F | 1.89 in. |
| April | 30.9 °F | 63.0 °F | 0.87 in. |
| May | 38.6 °F | 72.1 °F | 0.65 in. |
| June | 46.8 °F | 82.7 °F | 0.53 in. |
| July | 53.8 °F | 83.9 °F | 3.18 in. |
| August | 52.8 °F | 81.0 °F | 3.56 in. |
| September | 46.3 °F | 76.7 °F | 1.96 in. |
| October | 35.3 °F | 67.0 °F | 1.61 in. |
| November | 26.0 °F | 55.9 °F | 1.44 in. |
| December | 19.0 °F | 46.4 °F | 2.14 in. |
| Annual | 34.7 °F | 65.1 °F | 21.66 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |