Gilbert, Arizona has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 15.2 °C (low) to 30.2 °C (high). Annual precipitation averages 230.2 Millimeters. Gilbert is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.6 °C | 19.6 °C | 29.72 mm |
| February | 7.2 °C | 21.5 °C | 25.91 mm |
| March | 9.7 °C | 25.1 °C | 22.86 mm |
| April | 13 °C | 29.2 °C | 9.91 mm |
| May | 17.9 °C | 34.2 °C | 3.56 mm |
| June | 22.6 °C | 39.4 °C | 1.27 mm |
| July | 26.4 °C | 40.7 °C | 28.45 mm |
| August | 26.2 °C | 40.1 °C | 27.69 mm |
| September | 22.8 °C | 37.5 °C | 22.61 mm |
| October | 15.9 °C | 31.7 °C | 14.99 mm |
| November | 9.7 °C | 24.7 °C | 14.48 mm |
| December | 5.3 °C | 19 °C | 28.7 mm |
| Annual | 15.2 °C | 30.2 °C | 230.15 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BWh - Hot Desert Climate |