Kearny, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 12.8 °C (low) to 29.5 °C (high). Annual precipitation averages 319.8 Millimeters. 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 | 3.4 °C | 18.7 °C | 42.42 mm |
| February | 4.7 °C | 20.6 °C | 38.86 mm |
| March | 7.4 °C | 24.3 °C | 36.07 mm |
| April | 10.4 °C | 28.7 °C | 8.64 mm |
| May | 14.9 °C | 34 °C | 7.62 mm |
| June | 20.2 °C | 39.2 °C | 2.54 mm |
| July | 24.3 °C | 39.9 °C | 33.78 mm |
| August | 23.9 °C | 39 °C | 53.34 mm |
| September | 20.5 °C | 36.6 °C | 24.64 mm |
| October | 13.8 °C | 31.1 °C | 17.53 mm |
| November | 7.2 °C | 23.8 °C | 19.81 mm |
| December | 3.3 °C | 18.1 °C | 34.54 mm |
| Annual | 12.8 °C | 29.5 °C | 319.79 mm |
| 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 : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |