Parker, Arizona has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 58.6 °F (low) to 87.8 °F (high). Annual precipitation averages 5 Inches. Parker is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.0 °F | 67.6 °F | 1.02 in. |
| February | 44.3 °F | 71.7 °F | 0.73 in. |
| March | 49.5 °F | 79.1 °F | 0.61 in. |
| April | 55.2 °F | 86.4 °F | 0.19 in. |
| May | 63.7 °F | 95.0 °F | 0.07 in. |
| June | 71.4 °F | 103.6 °F | 0.02 in. |
| July | 79.7 °F | 108.0 °F | 0.25 in. |
| August | 79.4 °F | 107.2 °F | 0.51 in. |
| September | 72.3 °F | 102.1 °F | 0.54 in. |
| October | 59.2 °F | 90.3 °F | 0.25 in. |
| November | 47.6 °F | 76.6 °F | 0.21 in. |
| December | 40.1 °F | 66.0 °F | 0.57 in. |
| Annual | 58.6 °F | 87.8 °F | 4.97 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BWh - Hot Desert Climate |