Aiken, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.8 °F (low) to 75.3 °F (high). Annual precipitation averages 49.2 Inches. Aiken is located in USDA Plant Hardiness Zone 8b. 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 | 33.9 °F | 56.6 °F | 4.59 in. |
| February | 36.5 °F | 60.3 °F | 3.84 in. |
| March | 42.4 °F | 68.0 °F | 4.48 in. |
| April | 50.3 °F | 76.3 °F | 3.23 in. |
| May | 59.3 °F | 83.6 °F | 3.36 in. |
| June | 67.1 °F | 89.7 °F | 5.12 in. |
| July | 70.1 °F | 92.3 °F | 4.78 in. |
| August | 68.9 °F | 90.7 °F | 5.15 in. |
| September | 63.5 °F | 85.3 °F | 3.92 in. |
| October | 52.2 °F | 76.2 °F | 3.13 in. |
| November | 41.3 °F | 66.1 °F | 3.37 in. |
| December | 35.7 °F | 58.4 °F | 4.24 in. |
| Annual | 51.8 °F | 75.3 °F | 49.21 in. |
| 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |