North Topsail Beach, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.6 °C (low) to 21.6 °C (high). Annual precipitation averages 1511.8 Millimeters. North Topsail Beach 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.5 °C | 12.4 °C | 99.31 mm |
| February | 4.3 °C | 13.6 °C | 92.96 mm |
| March | 7 °C | 16.8 °C | 101.09 mm |
| April | 11.9 °C | 20.7 °C | 88.9 mm |
| May | 17.2 °C | 24.6 °C | 107.95 mm |
| June | 21.8 °C | 28.2 °C | 134.11 mm |
| July | 23.6 °C | 29.9 °C | 159.26 mm |
| August | 23 °C | 29.4 °C | 201.68 mm |
| September | 20.5 °C | 27.6 °C | 208.79 mm |
| October | 14.9 °C | 23.3 °C | 120.4 mm |
| November | 9.2 °C | 18.4 °C | 103.12 mm |
| December | 5.7 °C | 14.4 °C | 94.23 mm |
| Annual | 13.6 °C | 21.6 °C | 1511.8 mm |
| 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 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |