Emerald Isle, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.1 °C (low) to 21.7 °C (high). Annual precipitation averages 1530.1 Millimeters. Emerald Isle is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.8 °C | 12.4 °C | 110.74 mm |
| February | 4.7 °C | 13.4 °C | 95.5 mm |
| March | 7.7 °C | 16.7 °C | 94.49 mm |
| April | 12.7 °C | 20.9 °C | 97.54 mm |
| May | 17.6 °C | 25 °C | 109.73 mm |
| June | 22.1 °C | 28.4 °C | 125.73 mm |
| July | 24 °C | 29.9 °C | 163.58 mm |
| August | 23.4 °C | 29.7 °C | 187.71 mm |
| September | 21.2 °C | 27.7 °C | 196.09 mm |
| October | 15.7 °C | 23.4 °C | 132.08 mm |
| November | 9.8 °C | 18.3 °C | 110.74 mm |
| December | 6.2 °C | 14.4 °C | 106.17 mm |
| Annual | 14.1 °C | 21.7 °C | 1530.1 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |