Hayden, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 11.4 °C (low) to 29.7 °C (high). Annual precipitation averages 352.3 Millimeters. Hayden is located in USDA Plant Hardiness Zone 9a. 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 | 2 °C | 18.9 °C | 43.43 mm |
| February | 3.3 °C | 20.7 °C | 42.93 mm |
| March | 5.9 °C | 24.3 °C | 31.24 mm |
| April | 9 °C | 28.9 °C | 10.41 mm |
| May | 13.7 °C | 34.3 °C | 7.87 mm |
| June | 19.2 °C | 39.7 °C | 4.32 mm |
| July | 23.2 °C | 39.9 °C | 45.97 mm |
| August | 22.7 °C | 39.1 °C | 56.64 mm |
| September | 19.2 °C | 36.7 °C | 35.81 mm |
| October | 11.8 °C | 31.3 °C | 21.84 mm |
| November | 5.3 °C | 24 °C | 21.59 mm |
| December | 1.6 °C | 18.4 °C | 30.23 mm |
| Annual | 11.4 °C | 29.7 °C | 352.28 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 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |