| 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 29406 - Charleston, SC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 37 | 39 | 46 | 52 | 61 | 68 | 72 | 71 | 67 | 55 | 46 | 39 | 55 |
| Avg Max Temp (°F) | 58 | 62 | 69 | 76 | 83 | 88 | 91 | 89 | 85 | 77 | 69 | 61 | 76 |
| Avg Precip (In.) | 4.09 | 3.09 | 4.11 | 2.78 | 3.6 | 5.85 | 6.01 | 6.81 | 5.86 | 3.14 | 2.65 | 3.25 | 51.23 |