Dunean, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.3 °F (low) to 71.5 °F (high). Annual precipitation averages 52.3 Inches. Dunean 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 | 52.2 °F | 4.32 in. |
| February | 34.2 °F | 56.2 °F | 4.04 in. |
| March | 40.8 °F | 63.5 °F | 4.69 in. |
| April | 48.6 °F | 72.2 °F | 4.47 in. |
| May | 57.7 °F | 79.3 °F | 3.73 in. |
| June | 65.6 °F | 85.8 °F | 4.36 in. |
| July | 69.1 °F | 89.5 °F | 4.59 in. |
| August | 68.3 °F | 87.7 °F | 5.24 in. |
| September | 62.5 °F | 82.1 °F | 3.97 in. |
| October | 50.6 °F | 72.4 °F | 4.02 in. |
| November | 39.8 °F | 62.5 °F | 3.99 in. |
| December | 34.6 °F | 54.5 °F | 4.86 in. |
| Annual | 50.3 °F | 71.5 °F | 52.28 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |