Mormon Lake, Arizona has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 33 °F (low) to 62.2 °F (high). Annual precipitation averages 27.1 Inches. Mormon Lake is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.6 °F | 44.3 °F | 3.08 in. |
| February | 20.6 °F | 46.5 °F | 3.39 in. |
| March | 24.8 °F | 52.7 °F | 2.8 in. |
| April | 29.0 °F | 59.1 °F | 1.36 in. |
| May | 36.3 °F | 67.9 °F | 0.9 in. |
| June | 44.6 °F | 79.2 °F | 0.32 in. |
| July | 52.0 °F | 82.2 °F | 2.27 in. |
| August | 50.6 °F | 79.6 °F | 4.16 in. |
| September | 43.5 °F | 74.4 °F | 1.99 in. |
| October | 33.2 °F | 63.8 °F | 1.66 in. |
| November | 24.5 °F | 52.6 °F | 2.21 in. |
| December | 18.1 °F | 44.1 °F | 2.96 in. |
| Annual | 33 °F | 62.2 °F | 27.1 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |