North Charleston, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.9 °F (low) to 75.3 °F (high). Annual precipitation averages 54.3 Inches. North Charleston is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.9 °F | 59.1 °F | 3.13 in. |
| February | 41.4 °F | 61.9 °F | 3.31 in. |
| March | 47.4 °F | 68.2 °F | 3.47 in. |
| April | 55.3 °F | 75.1 °F | 3.47 in. |
| May | 63.9 °F | 81.9 °F | 3.32 in. |
| June | 71.0 °F | 87.2 °F | 6.06 in. |
| July | 74.3 °F | 90.2 °F | 7.31 in. |
| August | 73.5 °F | 88.7 °F | 7.99 in. |
| September | 68.8 °F | 84.6 °F | 5.36 in. |
| October | 58.3 °F | 76.8 °F | 4.32 in. |
| November | 47.9 °F | 68.2 °F | 2.76 in. |
| December | 41.9 °F | 61.7 °F | 3.78 in. |
| Annual | 56.9 °F | 75.3 °F | 54.28 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |