| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°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. 21 - Dec. 31 | |
| Average Last Frost Date: | Feb. 21 - Feb. 29 | |
| 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 29455 - Johns Island, SC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 41 | 47 | 55 | 63 | 71 | 74 | 73 | 69 | 58 | 49 | 41 | 57 |
| Avg Max Temp (°F) | 58 | 60 | 67 | 74 | 81 | 86 | 89 | 88 | 84 | 76 | 68 | 60 | 74 |
| Avg Precip (In.) | 3.96 | 2.95 | 4.09 | 2.68 | 3.14 | 5.36 | 5.56 | 6.62 | 5.76 | 3.24 | 2.56 | 3.14 | 49.06 |