Mammoth, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 53.2 °F (low) to 85.3 °F (high). Annual precipitation averages 12.4 Inches. Mammoth is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.2 °F | 66.7 °F | 1.2 in. |
| February | 38.9 °F | 69.5 °F | 1.3 in. |
| March | 43.8 °F | 76.1 °F | 0.85 in. |
| April | 49.1 °F | 84.3 °F | 0.33 in. |
| May | 57.2 °F | 93.4 °F | 0.24 in. |
| June | 67.0 °F | 103.0 °F | 0.18 in. |
| July | 73.8 °F | 102.7 °F | 2.08 in. |
| August | 72.6 °F | 100.9 °F | 2.31 in. |
| September | 66.8 °F | 97.0 °F | 1.28 in. |
| October | 54.4 °F | 87.9 °F | 0.68 in. |
| November | 42.9 °F | 75.8 °F | 0.71 in. |
| December | 35.7 °F | 65.8 °F | 1.2 in. |
| Annual | 53.2 °F | 85.3 °F | 12.36 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |