Caswell Beach, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.6 °F (low) to 71.5 °F (high). Annual precipitation averages 58.8 Inches. Caswell Beach 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 | 38.2 °F | 54.5 °F | 3.84 in. |
| February | 39.7 °F | 56.8 °F | 3.54 in. |
| March | 45.8 °F | 62.8 °F | 3.93 in. |
| April | 54.9 °F | 71.1 °F | 3.44 in. |
| May | 63.6 °F | 78.0 °F | 4.17 in. |
| June | 71.3 °F | 84.4 °F | 5.09 in. |
| July | 74.9 °F | 85.2 °F | 6.77 in. |
| August | 73.5 °F | 86.4 °F | 7.06 in. |
| September | 68.8 °F | 81.5 °F | 8.65 in. |
| October | 58.3 °F | 74.0 °F | 4.9 in. |
| November | 48.0 °F | 65.2 °F | 3.68 in. |
| December | 41.6 °F | 58.2 °F | 3.77 in. |
| Annual | 56.6 °F | 71.5 °F | 58.84 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |