Calhoun Falls, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.5 °F (low) to 73.6 °F (high). Annual precipitation averages 47.2 Inches. Calhoun Falls 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 | 32.0 °F | 54.4 °F | 4.14 in. |
| February | 34.4 °F | 58.0 °F | 4.09 in. |
| March | 40.5 °F | 65.9 °F | 4.65 in. |
| April | 48.8 °F | 74.2 °F | 3.2 in. |
| May | 57.9 °F | 81.4 °F | 3.09 in. |
| June | 66.2 °F | 87.9 °F | 4.4 in. |
| July | 69.9 °F | 91.1 °F | 4.07 in. |
| August | 69.0 °F | 89.5 °F | 4.25 in. |
| September | 63.0 °F | 84.4 °F | 3.65 in. |
| October | 50.6 °F | 74.8 °F | 3.23 in. |
| November | 39.5 °F | 64.8 °F | 3.67 in. |
| December | 34.4 °F | 56.6 °F | 4.71 in. |
| Annual | 50.5 °F | 73.6 °F | 47.15 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 |