| 2023 Hardiness Zone: | 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 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: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 29935 - Port Royal, SC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 40 | 47 | 54 | 63 | 70 | 73 | 72 | 68 | 58 | 48 | 41 | 56 |
| Avg Max Temp (°F) | 59 | 62 | 68 | 75 | 82 | 87 | 90 | 89 | 84 | 77 | 69 | 61 | 75 |
| Avg Precip (In.) | 4.13 | 3.1 | 3.77 | 2.98 | 3.15 | 5.68 | 5.69 | 7.48 | 5.37 | 3.05 | 2.62 | 3.14 | 50.15 |