Miracle Valley, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.4 °C (low) to 25.9 °C (high). Annual precipitation averages 369.8 Millimeters. Miracle Valley is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.6 °C | 16.7 °C | 20.83 mm |
| February | 1.1 °C | 18.3 °C | 17.02 mm |
| March | 3.9 °C | 21.8 °C | 18.29 mm |
| April | 6.6 °C | 26.2 °C | 5.84 mm |
| May | 10.7 °C | 30.5 °C | 5.59 mm |
| June | 16.1 °C | 34.8 °C | 15.24 mm |
| July | 18.8 °C | 33.8 °C | 84.33 mm |
| August | 18.1 °C | 32.6 °C | 99.06 mm |
| September | 15.1 °C | 31.2 °C | 42.16 mm |
| October | 8.8 °C | 27.2 °C | 19.81 mm |
| November | 3.2 °C | 21.5 °C | 18.29 mm |
| December | -0.5 °C | 16.4 °C | 23.37 mm |
| Annual | 8.4 °C | 25.9 °C | 369.83 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |