Old Fort, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.6 °C (low) to 20.9 °C (high). Annual precipitation averages 1433.8 Millimeters. Old Fort is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.5 °C | 10 °C | 121.41 mm |
| February | -1.3 °C | 12.2 °C | 92.96 mm |
| March | 2.2 °C | 16.4 °C | 122.68 mm |
| April | 6.6 °C | 21.6 °C | 128.52 mm |
| May | 11.7 °C | 25.3 °C | 117.35 mm |
| June | 16.1 °C | 28.8 °C | 121.92 mm |
| July | 18.2 °C | 30.5 °C | 123.44 mm |
| August | 17.7 °C | 29.7 °C | 127.25 mm |
| September | 14.3 °C | 26.7 °C | 128.52 mm |
| October | 7.7 °C | 21.8 °C | 122.43 mm |
| November | 1.7 °C | 16.3 °C | 98.55 mm |
| December | -1.3 °C | 11.6 °C | 128.78 mm |
| Annual | 7.6 °C | 20.9 °C | 1433.81 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |