Greer, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.4 °C (low) to 21.8 °C (high). Annual precipitation averages 1350.5 Millimeters. Greer is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.1 °C | 10.9 °C | 113.79 mm |
| February | 1.5 °C | 13.2 °C | 102.11 mm |
| March | 5.2 °C | 17.3 °C | 119.63 mm |
| April | 9.6 °C | 22.2 °C | 112.27 mm |
| May | 14.6 °C | 26.2 °C | 105.16 mm |
| June | 18.8 °C | 29.8 °C | 118.36 mm |
| July | 20.8 °C | 31.8 °C | 119.13 mm |
| August | 20.3 °C | 30.8 °C | 127.76 mm |
| September | 17.1 °C | 27.7 °C | 104.39 mm |
| October | 10.7 °C | 22.3 °C | 100.84 mm |
| November | 4.7 °C | 16.7 °C | 104.9 mm |
| December | 1.7 °C | 12.2 °C | 122.17 mm |
| Annual | 10.4 °C | 21.8 °C | 1350.51 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |