Belhaven, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.5 °F (low) to 72.1 °F (high). Annual precipitation averages 52.5 Inches. Belhaven 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. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.7 °F | 53.6 °F | 3.73 in. |
| February | 35.5 °F | 56.9 °F | 3.13 in. |
| March | 41.4 °F | 63.0 °F | 3.86 in. |
| April | 50.6 °F | 72.1 °F | 3.37 in. |
| May | 59.6 °F | 79.0 °F | 4.05 in. |
| June | 67.4 °F | 85.7 °F | 5.32 in. |
| July | 71.6 °F | 88.9 °F | 6.01 in. |
| August | 70.2 °F | 87.4 °F | 6.41 in. |
| September | 65.2 °F | 82.5 °F | 6.13 in. |
| October | 53.9 °F | 74.0 °F | 3.57 in. |
| November | 43.4 °F | 64.5 °F | 3.46 in. |
| December | 36.9 °F | 57.0 °F | 3.44 in. |
| Annual | 52.5 °F | 72.1 °F | 52.48 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |