Cornville, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 7.7 °C (low) to 26.4 °C (high). Annual precipitation averages 367.3 Millimeters. Cornville is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.4 °C | 15.4 °C | 37.34 mm |
| February | 0.2 °C | 17.7 °C | 32 mm |
| March | 3.1 °C | 21.3 °C | 33.27 mm |
| April | 5.9 °C | 25.4 °C | 14.22 mm |
| May | 10.1 °C | 30.2 °C | 7.87 mm |
| June | 14.6 °C | 36.3 °C | 4.06 mm |
| July | 19.1 °C | 37.7 °C | 50.29 mm |
| August | 18.6 °C | 36.3 °C | 62.23 mm |
| September | 14.6 °C | 33.4 °C | 38.86 mm |
| October | 8 °C | 27.8 °C | 24.64 mm |
| November | 1.8 °C | 20.7 °C | 23.11 mm |
| December | -1.7 °C | 14.8 °C | 39.37 mm |
| Annual | 7.7 °C | 26.4 °C | 367.26 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |