Cornfields, Arizona has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.4 °C (low) to 19.7 °C (high). Annual precipitation averages 232.2 Millimeters. Cornfields 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.6 °C | 7.2 °C | 17.78 mm |
| February | -5.4 °C | 9.8 °C | 17.78 mm |
| March | -2.7 °C | 14.5 °C | 17.78 mm |
| April | 0.6 °C | 18.8 °C | 11.94 mm |
| May | 5.1 °C | 24.1 °C | 12.45 mm |
| June | 9.9 °C | 30.5 °C | 4.06 mm |
| July | 14.3 °C | 32.3 °C | 29.72 mm |
| August | 13.9 °C | 30.6 °C | 34.29 mm |
| September | 9.4 °C | 27.2 °C | 23.62 mm |
| October | 2.7 °C | 20.8 °C | 22.61 mm |
| November | -3.3 °C | 13.2 °C | 16.51 mm |
| December | -7.6 °C | 7.2 °C | 23.62 mm |
| Annual | 2.4 °C | 19.7 °C | 232.16 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |