Bald Head Island, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.4 °C (low) to 21.8 °C (high). Annual precipitation averages 1493 Millimeters. Bald Head Island is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.3 °C | 12.2 °C | 98.04 mm |
| February | 4.9 °C | 13.4 °C | 89.92 mm |
| March | 8.5 °C | 16.6 °C | 99.31 mm |
| April | 13.5 °C | 21.2 °C | 88.14 mm |
| May | 18.3 °C | 25.3 °C | 104.14 mm |
| June | 22.6 °C | 29.1 °C | 129.54 mm |
| July | 24.5 °C | 30.2 °C | 171.45 mm |
| August | 23.9 °C | 30 °C | 180.85 mm |
| September | 21.1 °C | 27.6 °C | 217.42 mm |
| October | 15.4 °C | 23.2 °C | 124.21 mm |
| November | 9.8 °C | 18.3 °C | 93.47 mm |
| December | 6.3 °C | 14.2 °C | 96.52 mm |
| Annual | 14.4 °C | 21.8 °C | 1493.01 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |