Greer, Arizona has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.1 °C (low) to 15.4 °C (high). Annual precipitation averages 561.1 Millimeters. Greer is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.3 °C | 6.6 °C | 43.18 mm |
| February | -7.3 °C | 7.3 °C | 38.61 mm |
| March | -5 °C | 10.4 °C | 37.85 mm |
| April | -2.3 °C | 14 °C | 20.57 mm |
| May | 1.7 °C | 18.8 °C | 18.29 mm |
| June | 6.8 °C | 24.5 °C | 13.72 mm |
| July | 9.6 °C | 24.8 °C | 104.65 mm |
| August | 9.1 °C | 23.3 °C | 108.71 mm |
| September | 5.9 °C | 21.2 °C | 53.85 mm |
| October | 0.4 °C | 16.6 °C | 40.13 mm |
| November | -4.1 °C | 11.1 °C | 34.54 mm |
| December | -8.2 °C | 6.6 °C | 46.99 mm |
| Annual | -0.1 °C | 15.4 °C | 561.09 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |