Lake Montezuma, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 7.5 °C (low) to 25.8 °C (high). Annual precipitation averages 376.9 Millimeters. Lake Montezuma is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.6 °C | 15.1 °C | 37.59 mm |
| February | -0.1 °C | 16.9 °C | 38.86 mm |
| March | 2.7 °C | 20.4 °C | 38.35 mm |
| April | 5.7 °C | 24.7 °C | 16.26 mm |
| May | 9.9 °C | 29.5 °C | 11.18 mm |
| June | 14.4 °C | 35.6 °C | 4.32 mm |
| July | 18.9 °C | 37.1 °C | 43.43 mm |
| August | 18.2 °C | 35.7 °C | 53.59 mm |
| September | 14.2 °C | 32.9 °C | 41.4 mm |
| October | 7.6 °C | 27.2 °C | 28.7 mm |
| November | 1.5 °C | 20.2 °C | 23.37 mm |
| December | -2 °C | 14.3 °C | 39.88 mm |
| Annual | 7.5 °C | 25.8 °C | 376.93 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |