Whiteriver, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 4.2 °C (low) to 22.4 °C (high). Annual precipitation averages 470.9 Millimeters. Whiteriver is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.9 °C | 12.1 °C | 44.45 mm |
| February | -3.1 °C | 13.9 °C | 44.96 mm |
| March | -0.6 °C | 17.3 °C | 40.64 mm |
| April | 1.9 °C | 21.1 °C | 13.21 mm |
| May | 5.7 °C | 26 °C | 12.45 mm |
| June | 10.6 °C | 31.8 °C | 10.67 mm |
| July | 14.9 °C | 32.8 °C | 56.39 mm |
| August | 14.4 °C | 31.6 °C | 91.95 mm |
| September | 10.6 °C | 29.2 °C | 50.8 mm |
| October | 4.7 °C | 23.8 °C | 34.54 mm |
| November | -0.8 °C | 17.6 °C | 30.23 mm |
| December | -4.2 °C | 12 °C | 40.64 mm |
| Annual | 4.2 °C | 22.4 °C | 470.93 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |