McCormick, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.7 °F (low) to 74.2 °F (high). Annual precipitation averages 46.4 Inches. McCormick 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 | 32.6 °F | 55.0 °F | 4.08 in. |
| February | 34.6 °F | 58.4 °F | 3.88 in. |
| March | 40.8 °F | 66.4 °F | 4.51 in. |
| April | 49.0 °F | 74.9 °F | 3.19 in. |
| May | 57.9 °F | 82.1 °F | 3.25 in. |
| June | 66.1 °F | 88.3 °F | 4.54 in. |
| July | 69.6 °F | 91.5 °F | 4.07 in. |
| August | 68.6 °F | 90.3 °F | 4.34 in. |
| September | 62.8 °F | 85.1 °F | 3.67 in. |
| October | 50.9 °F | 75.7 °F | 3.04 in. |
| November | 40.0 °F | 65.2 °F | 3.51 in. |
| December | 35.1 °F | 57.0 °F | 4.3 in. |
| Annual | 50.7 °F | 74.2 °F | 46.38 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |