Tybee Island, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 60 °F (low) to 74.9 °F (high). Annual precipitation averages 47.4 Inches. Tybee Island is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.5 °F | 59.3 °F | 3.28 in. |
| February | 45.2 °F | 61.7 °F | 3.06 in. |
| March | 50.8 °F | 67.4 °F | 3.32 in. |
| April | 58.3 °F | 73.9 °F | 2.62 in. |
| May | 66.8 °F | 81.0 °F | 2.77 in. |
| June | 73.3 °F | 86.5 °F | 4.98 in. |
| July | 76.1 °F | 89.4 °F | 4.65 in. |
| August | 75.6 °F | 88.3 °F | 7.33 in. |
| September | 71.9 °F | 84.2 °F | 5.44 in. |
| October | 62.4 °F | 77.4 °F | 4.66 in. |
| November | 51.8 °F | 68.6 °F | 2.28 in. |
| December | 45.6 °F | 61.3 °F | 2.97 in. |
| Annual | 60 °F | 74.9 °F | 47.36 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |