Hayden, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 52.5 °F (low) to 85.4 °F (high). Annual precipitation averages 13.9 Inches. 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 | 35.6 °F | 66.1 °F | 1.71 in. |
| February | 37.9 °F | 69.2 °F | 1.69 in. |
| March | 42.6 °F | 75.8 °F | 1.23 in. |
| April | 48.2 °F | 84.0 °F | 0.41 in. |
| May | 56.7 °F | 93.8 °F | 0.31 in. |
| June | 66.5 °F | 103.4 °F | 0.17 in. |
| July | 73.7 °F | 103.9 °F | 1.81 in. |
| August | 72.8 °F | 102.4 °F | 2.23 in. |
| September | 66.5 °F | 98.0 °F | 1.41 in. |
| October | 53.3 °F | 88.4 °F | 0.86 in. |
| November | 41.5 °F | 75.2 °F | 0.85 in. |
| December | 34.8 °F | 65.1 °F | 1.19 in. |
| Annual | 52.5 °F | 85.4 °F | 13.87 in. |
| 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 : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |