Sunbury, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.4 °C (low) to 21.9 °C (high). Annual precipitation averages 1309.4 Millimeters. Sunbury 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 | -1.2 °C | 10.9 °C | 95.5 mm |
| February | -0.3 °C | 12.6 °C | 77.72 mm |
| March | 3.2 °C | 16.3 °C | 104.9 mm |
| April | 8.4 °C | 22.2 °C | 94.74 mm |
| May | 13.4 °C | 25.9 °C | 103.63 mm |
| June | 18.2 °C | 30.1 °C | 129.29 mm |
| July | 20.5 °C | 31.9 °C | 140.72 mm |
| August | 19.7 °C | 31.2 °C | 135.89 mm |
| September | 16.6 °C | 28.3 °C | 150.11 mm |
| October | 9.9 °C | 23.1 °C | 98.04 mm |
| November | 3.8 °C | 17.6 °C | 88.39 mm |
| December | 0.6 °C | 12.8 °C | 90.42 mm |
| Annual | 9.4 °C | 21.9 °C | 1309.35 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |