North Charleston, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.8 °C (low) to 24.1 °C (high). Annual precipitation averages 1378.7 Millimeters. 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 | 3.8 °C | 15.1 °C | 79.5 mm |
| February | 5.2 °C | 16.6 °C | 84.07 mm |
| March | 8.6 °C | 20.1 °C | 88.14 mm |
| April | 12.9 °C | 23.9 °C | 88.14 mm |
| May | 17.7 °C | 27.7 °C | 84.33 mm |
| June | 21.7 °C | 30.7 °C | 153.92 mm |
| July | 23.5 °C | 32.3 °C | 185.67 mm |
| August | 23.1 °C | 31.5 °C | 202.95 mm |
| September | 20.4 °C | 29.2 °C | 136.14 mm |
| October | 14.6 °C | 24.9 °C | 109.73 mm |
| November | 8.8 °C | 20.1 °C | 70.1 mm |
| December | 5.5 °C | 16.5 °C | 96.01 mm |
| Annual | 13.8 °C | 24.1 °C | 1378.7 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |