Jacksonville, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11 °C (low) to 23.2 °C (high). Annual precipitation averages 1484.9 Millimeters. Jacksonville 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.7 °C | 13.4 °C | 98.3 mm |
| February | 1.7 °C | 15.1 °C | 91.69 mm |
| March | 4.9 °C | 18.8 °C | 103.89 mm |
| April | 9.9 °C | 23.4 °C | 86.87 mm |
| May | 14.9 °C | 26.9 °C | 114.3 mm |
| June | 19.4 °C | 30.4 °C | 141.48 mm |
| July | 21.7 °C | 32.2 °C | 162.05 mm |
| August | 20.8 °C | 31.1 °C | 195.58 mm |
| September | 18.1 °C | 28.8 °C | 195.58 mm |
| October | 11.6 °C | 24.2 °C | 110.24 mm |
| November | 5.4 °C | 19.1 °C | 84.07 mm |
| December | 2.4 °C | 15.2 °C | 100.84 mm |
| Annual | 11 °C | 23.2 °C | 1484.89 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 8b : -9.4°C to -6.7°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 |