Maricopa, California has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 10.9 °C (low) to 25.5 °C (high). Annual precipitation averages 169.9 Millimeters. Maricopa is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.7 °C | 14.6 °C | 29.46 mm |
| February | 5.3 °C | 17.2 °C | 33.53 mm |
| March | 7.3 °C | 20.3 °C | 34.8 mm |
| April | 9.1 °C | 24.3 °C | 11.43 mm |
| May | 12.7 °C | 28.9 °C | 9.14 mm |
| June | 16.2 °C | 33.5 °C | 2.29 mm |
| July | 19.9 °C | 36.8 °C | 0.25 mm |
| August | 18.9 °C | 36.1 °C | 0.51 mm |
| September | 16.2 °C | 33.1 °C | 1.52 mm |
| October | 11.6 °C | 26.8 °C | 6.6 mm |
| November | 6.5 °C | 19.4 °C | 15.24 mm |
| December | 3.3 °C | 14.7 °C | 25.15 mm |
| Annual | 10.9 °C | 25.5 °C | 169.92 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWk - Cold Desert Climate |