Winslow, Arizona has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 4.2 °C (low) to 22.2 °C (high). Annual precipitation averages 186.9 Millimeters. Winslow is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.2 °C | 9.9 °C | 14.48 mm |
| February | -3.9 °C | 13.1 °C | 11.94 mm |
| March | -0.8 °C | 17.7 °C | 14.48 mm |
| April | 2.3 °C | 21.6 °C | 9.14 mm |
| May | 7.2 °C | 26.7 °C | 7.87 mm |
| June | 12.3 °C | 32.7 °C | 3.81 mm |
| July | 17.1 °C | 34.3 °C | 24.89 mm |
| August | 16.2 °C | 32.7 °C | 31.24 mm |
| September | 11.4 °C | 29.3 °C | 23.62 mm |
| October | 3.8 °C | 23.1 °C | 17.78 mm |
| November | -2.6 °C | 16 °C | 12.45 mm |
| December | -6.4 °C | 9.6 °C | 15.24 mm |
| Annual | 4.2 °C | 22.2 °C | 186.94 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BWk - Cold Desert Climate |