Coolidge, Arizona has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 13.2 °C (low) to 30 °C (high). Annual precipitation averages 218.9 Millimeters. Coolidge is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.7 °C | 19.3 °C | 27.94 mm |
| February | 5.2 °C | 21.3 °C | 25.4 mm |
| March | 7.5 °C | 25 °C | 26.67 mm |
| April | 10.7 °C | 29.1 °C | 7.37 mm |
| May | 15.3 °C | 34.3 °C | 5.08 mm |
| June | 20.5 °C | 39.4 °C | 1.52 mm |
| July | 25.1 °C | 40.2 °C | 24.13 mm |
| August | 24.7 °C | 39.3 °C | 33.27 mm |
| September | 21.2 °C | 37.1 °C | 16.76 mm |
| October | 14.1 °C | 31.5 °C | 13.97 mm |
| November | 7.4 °C | 24.6 °C | 13.21 mm |
| December | 3.3 °C | 18.7 °C | 23.62 mm |
| Annual | 13.2 °C | 30 °C | 218.94 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |