| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Dec. 21 - Dec. 31 | |
| Average Last Frost Date: | Feb. 11 - Feb. 20 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 75j - Sea Islands/Coastal Marsh | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 29492 - Charleston, SC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 39 | 46 | 53 | 62 | 69 | 73 | 72 | 67 | 56 | 48 | 40 | 55 |
| Avg Max Temp (°F) | 58 | 61 | 67 | 75 | 81 | 87 | 90 | 88 | 84 | 76 | 69 | 61 | 75 |
| Avg Precip (In.) | 4.13 | 3.07 | 4.16 | 2.75 | 3.32 | 5.51 | 5.69 | 6.59 | 5.72 | 3.31 | 2.7 | 3.27 | 50.22 |