Greer, Arizona has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.8 °F (low) to 59.8 °F (high). Annual precipitation averages 22.1 Inches. 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 | 17.0 °F | 43.8 °F | 1.7 in. |
| February | 18.8 °F | 45.2 °F | 1.52 in. |
| March | 23.0 °F | 50.7 °F | 1.49 in. |
| April | 27.9 °F | 57.2 °F | 0.81 in. |
| May | 35.1 °F | 65.9 °F | 0.72 in. |
| June | 44.3 °F | 76.1 °F | 0.54 in. |
| July | 49.3 °F | 76.6 °F | 4.12 in. |
| August | 48.3 °F | 74.0 °F | 4.28 in. |
| September | 42.7 °F | 70.1 °F | 2.12 in. |
| October | 32.8 °F | 61.8 °F | 1.58 in. |
| November | 24.7 °F | 51.9 °F | 1.36 in. |
| December | 17.3 °F | 43.9 °F | 1.85 in. |
| Annual | 31.8 °F | 59.8 °F | 22.09 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |