Carefree, Arizona has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 14.3 °C (low) to 28.1 °C (high). Annual precipitation averages 315 Millimeters. Carefree is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.3 °C | 17.9 °C | 41.91 mm |
| February | 6.1 °C | 19.2 °C | 44.2 mm |
| March | 8.3 °C | 22.6 °C | 39.37 mm |
| April | 11.3 °C | 26.7 °C | 12.45 mm |
| May | 16.4 °C | 31.8 °C | 6.6 mm |
| June | 21.4 °C | 37.2 °C | 1.27 mm |
| July | 24.7 °C | 38.8 °C | 31.75 mm |
| August | 24.4 °C | 38 °C | 35.56 mm |
| September | 21.8 °C | 35.6 °C | 20.07 mm |
| October | 16.2 °C | 29.6 °C | 25.91 mm |
| November | 9.7 °C | 22.8 °C | 19.05 mm |
| December | 5.7 °C | 17.4 °C | 36.83 mm |
| Annual | 14.3 °C | 28.1 °C | 314.97 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 | BSh - Hot Semi-Arid Climate |