Kearny, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 55.1 °F (low) to 85.1 °F (high). Annual precipitation averages 12.6 Inches. Kearny is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.2 °F | 65.6 °F | 1.67 in. |
| February | 40.5 °F | 69.0 °F | 1.53 in. |
| March | 45.3 °F | 75.7 °F | 1.42 in. |
| April | 50.7 °F | 83.6 °F | 0.34 in. |
| May | 58.9 °F | 93.2 °F | 0.3 in. |
| June | 68.4 °F | 102.6 °F | 0.1 in. |
| July | 75.8 °F | 103.8 °F | 1.33 in. |
| August | 75.1 °F | 102.2 °F | 2.1 in. |
| September | 68.9 °F | 97.9 °F | 0.97 in. |
| October | 56.8 °F | 88.0 °F | 0.69 in. |
| November | 45.0 °F | 74.9 °F | 0.78 in. |
| December | 37.9 °F | 64.6 °F | 1.36 in. |
| Annual | 55.1 °F | 85.1 °F | 12.59 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |