Gilbert, Arizona has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 59.4 °F (low) to 86.4 °F (high). Annual precipitation averages 9.1 Inches. Gilbert is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.0 °F | 67.2 °F | 1.17 in. |
| February | 45.0 °F | 70.7 °F | 1.02 in. |
| March | 49.5 °F | 77.2 °F | 0.9 in. |
| April | 55.4 °F | 84.5 °F | 0.39 in. |
| May | 64.3 °F | 93.5 °F | 0.14 in. |
| June | 72.6 °F | 102.9 °F | 0.05 in. |
| July | 79.6 °F | 105.3 °F | 1.12 in. |
| August | 79.2 °F | 104.1 °F | 1.09 in. |
| September | 73.0 °F | 99.5 °F | 0.89 in. |
| October | 60.6 °F | 89.1 °F | 0.59 in. |
| November | 49.5 °F | 76.4 °F | 0.57 in. |
| December | 41.5 °F | 66.2 °F | 1.13 in. |
| Annual | 59.4 °F | 86.4 °F | 9.06 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 | Severe Drought |
| Köppen Climate Classification | BWh - Hot Desert Climate |