Half Moon, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.7 °C (low) to 23.2 °C (high). Annual precipitation averages 1475.2 Millimeters. Half Moon is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.4 °C | 13.2 °C | 98.3 mm |
| February | 1.4 °C | 14.9 °C | 90.17 mm |
| March | 4.6 °C | 18.6 °C | 101.85 mm |
| April | 9.6 °C | 23.4 °C | 85.09 mm |
| May | 14.6 °C | 27.1 °C | 116.08 mm |
| June | 19.2 °C | 30.5 °C | 144.02 mm |
| July | 21.4 °C | 32.3 °C | 169.16 mm |
| August | 20.6 °C | 31.2 °C | 189.74 mm |
| September | 17.8 °C | 28.7 °C | 191.52 mm |
| October | 11.3 °C | 24.1 °C | 106.43 mm |
| November | 5.2 °C | 18.9 °C | 84.84 mm |
| December | 2.2 °C | 14.9 °C | 98.04 mm |
| Annual | 10.7 °C | 23.2 °C | 1475.24 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |