Brunswick, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.1 °C (low) to 23.5 °C (high). Annual precipitation averages 1320.8 Millimeters. Brunswick is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.1 °C | 13.4 °C | 95.5 mm |
| February | 2.2 °C | 15.1 °C | 84.58 mm |
| March | 5.3 °C | 19.1 °C | 96.27 mm |
| April | 10 °C | 23.9 °C | 87.88 mm |
| May | 14.9 °C | 27.6 °C | 96.27 mm |
| June | 19.6 °C | 30.9 °C | 131.57 mm |
| July | 21.7 °C | 32.6 °C | 140.97 mm |
| August | 20.9 °C | 31.7 °C | 151.89 mm |
| September | 18 °C | 29 °C | 165.61 mm |
| October | 11.6 °C | 24.3 °C | 90.17 mm |
| November | 5.6 °C | 19 °C | 87.38 mm |
| December | 2.6 °C | 14.9 °C | 92.71 mm |
| Annual | 11.1 °C | 23.5 °C | 1320.8 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |