Harkers Island, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.7 °F (low) to 69.6 °F (high). Annual precipitation averages 62 Inches. Harkers Island is located in USDA Plant Hardiness Zone 9a. 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 | 39.0 °F | 53.8 °F | 4.56 in. |
| February | 40.6 °F | 55.1 °F | 4.14 in. |
| March | 46.4 °F | 60.4 °F | 3.84 in. |
| April | 55.3 °F | 67.5 °F | 4.07 in. |
| May | 64.0 °F | 74.6 °F | 4.37 in. |
| June | 72.0 °F | 81.1 °F | 4.48 in. |
| July | 75.6 °F | 84.3 °F | 6.19 in. |
| August | 74.6 °F | 83.7 °F | 7.88 in. |
| September | 70.5 °F | 80.4 °F | 8.33 in. |
| October | 60.6 °F | 72.7 °F | 5.01 in. |
| November | 50.2 °F | 64.0 °F | 4.69 in. |
| December | 43.4 °F | 57.4 °F | 4.41 in. |
| Annual | 57.7 °F | 69.6 °F | 61.97 in. |
| 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 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |