Winkelman, Arizona has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 11.4 °C (low) to 29.9 °C (high). Annual precipitation averages 332.7 Millimeters. Winkelman is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.1 °C | 19.1 °C | 40.89 mm |
| February | 3.4 °C | 20.8 °C | 40.89 mm |
| March | 5.8 °C | 24.4 °C | 28.96 mm |
| April | 9.1 °C | 29.1 °C | 9.65 mm |
| May | 13.7 °C | 34.6 °C | 7.62 mm |
| June | 19.2 °C | 39.9 °C | 3.81 mm |
| July | 23.2 °C | 40.2 °C | 41.15 mm |
| August | 22.8 °C | 39.2 °C | 55.88 mm |
| September | 19.3 °C | 36.7 °C | 32.77 mm |
| October | 11.7 °C | 31.6 °C | 20.83 mm |
| November | 5.3 °C | 24.1 °C | 20.57 mm |
| December | 1.6 °C | 18.5 °C | 29.72 mm |
| Annual | 11.4 °C | 29.9 °C | 332.74 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| 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 | Csa - Hot-Summer Mediterranean Climate |