Mammoth, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 11.8 °C (low) to 29.6 °C (high). Annual precipitation averages 313.9 Millimeters. 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 | 2.3 °C | 19.3 °C | 30.48 mm |
| February | 3.8 °C | 20.8 °C | 33.02 mm |
| March | 6.6 °C | 24.5 °C | 21.59 mm |
| April | 9.5 °C | 29.1 °C | 8.38 mm |
| May | 14 °C | 34.1 °C | 6.1 mm |
| June | 19.4 °C | 39.4 °C | 4.57 mm |
| July | 23.2 °C | 39.3 °C | 52.83 mm |
| August | 22.6 °C | 38.3 °C | 58.67 mm |
| September | 19.3 °C | 36.1 °C | 32.51 mm |
| October | 12.4 °C | 31.1 °C | 17.27 mm |
| November | 6.1 °C | 24.3 °C | 18.03 mm |
| December | 2.1 °C | 18.8 °C | 30.48 mm |
| Annual | 11.8 °C | 29.6 °C | 313.93 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |