Piedmont, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.1 °F (low) to 72.4 °F (high). Annual precipitation averages 49.9 Inches. Piedmont is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.6 °F | 52.8 °F | 4.56 in. |
| February | 34.1 °F | 56.8 °F | 4.12 in. |
| March | 40.5 °F | 64.2 °F | 4.69 in. |
| April | 48.3 °F | 73.2 °F | 3.96 in. |
| May | 57.3 °F | 80.2 °F | 3.54 in. |
| June | 65.5 °F | 86.9 °F | 4.38 in. |
| July | 69.0 °F | 90.7 °F | 4.03 in. |
| August | 68.1 °F | 88.9 °F | 4.74 in. |
| September | 62.4 °F | 83.2 °F | 3.55 in. |
| October | 50.3 °F | 73.7 °F | 3.48 in. |
| November | 39.8 °F | 63.2 °F | 3.92 in. |
| December | 34.4 °F | 55.1 °F | 4.96 in. |
| Annual | 50.1 °F | 72.4 °F | 49.93 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |