Manns Harbor, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.6 °F (low) to 70.1 °F (high). Annual precipitation averages 50.2 Inches. Manns Harbor 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 Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.9 °F | 52.2 °F | 4.14 in. |
| February | 36.9 °F | 54.0 °F | 3.13 in. |
| March | 42.1 °F | 60.2 °F | 3.51 in. |
| April | 51.5 °F | 68.6 °F | 2.99 in. |
| May | 60.5 °F | 76.1 °F | 3.63 in. |
| June | 68.9 °F | 83.6 °F | 4.67 in. |
| July | 73.0 °F | 87.5 °F | 5.25 in. |
| August | 72.0 °F | 85.8 °F | 6.03 in. |
| September | 68.1 °F | 81.2 °F | 5.33 in. |
| October | 58.3 °F | 72.8 °F | 4.12 in. |
| November | 47.6 °F | 63.3 °F | 3.47 in. |
| December | 40.4 °F | 56.0 °F | 3.93 in. |
| Annual | 54.6 °F | 70.1 °F | 50.2 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : 15°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 |