| 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 | |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F | |
| Average First Frost Date: | Dec. 1 - Dec. 10 | |
| Average Last Frost Date: | Mar. 1 - Mar. 10 | |
| 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 29414 - Charleston, SC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 40 | 47 | 53 | 62 | 69 | 73 | 72 | 68 | 56 | 47 | 40 | 55 |
| Avg Max Temp (°F) | 58 | 61 | 68 | 75 | 82 | 87 | 90 | 89 | 84 | 77 | 69 | 61 | 75 |
| Avg Precip (In.) | 4.02 | 3 | 4.1 | 2.72 | 3.47 | 5.74 | 5.93 | 6.72 | 5.86 | 3.14 | 2.6 | 3.19 | 50.49 |