Clemson, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.9 °F (low) to 72.7 °F (high). Annual precipitation averages 52.4 Inches. Clemson 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 | 32.4 °F | 53.3 °F | 4.87 in. |
| February | 35.0 °F | 57.1 °F | 4.37 in. |
| March | 41.3 °F | 64.6 °F | 4.76 in. |
| April | 49.2 °F | 73.2 °F | 4.14 in. |
| May | 58.2 °F | 80.3 °F | 3.81 in. |
| June | 66.3 °F | 87.2 °F | 4.27 in. |
| July | 69.7 °F | 90.5 °F | 4.03 in. |
| August | 69.0 °F | 89.0 °F | 5.41 in. |
| September | 63.2 °F | 83.7 °F | 3.86 in. |
| October | 51.1 °F | 74.1 °F | 3.82 in. |
| November | 40.5 °F | 63.7 °F | 3.98 in. |
| December | 35.3 °F | 55.7 °F | 5.11 in. |
| Annual | 50.9 °F | 72.7 °F | 52.43 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 |