Goodyear, Arizona has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 15 °C (low) to 30.5 °C (high). Annual precipitation averages 213.6 Millimeters. Goodyear is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.4 °C | 19.4 °C | 26.42 mm |
| February | 7.1 °C | 21.8 °C | 24.13 mm |
| March | 9.9 °C | 25.6 °C | 26.67 mm |
| April | 12.7 °C | 29.4 °C | 8.13 mm |
| May | 17.8 °C | 34.7 °C | 4.57 mm |
| June | 22.6 °C | 39.9 °C | 1.27 mm |
| July | 26.6 °C | 41.4 °C | 18.54 mm |
| August | 26.4 °C | 40.6 °C | 27.43 mm |
| September | 22.6 °C | 37.8 °C | 15.75 mm |
| October | 15.2 °C | 31.4 °C | 14.48 mm |
| November | 8.8 °C | 24.5 °C | 17.78 mm |
| December | 4.9 °C | 18.9 °C | 28.45 mm |
| Annual | 15 °C | 30.5 °C | 213.62 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| 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 | BWh - Hot Desert Climate |