Old Hundred, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.3 °C (low) to 22.9 °C (high). Annual precipitation averages 1202.7 Millimeters. Old Hundred is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.3 °C | 12 °C | 91.44 mm |
| February | 0.8 °C | 14 °C | 81.28 mm |
| March | 4.4 °C | 18.3 °C | 91.95 mm |
| April | 9.6 °C | 23.6 °C | 80.77 mm |
| May | 14.6 °C | 27.4 °C | 86.61 mm |
| June | 19.2 °C | 31.1 °C | 116.33 mm |
| July | 21.3 °C | 32.7 °C | 125.73 mm |
| August | 20.6 °C | 31.6 °C | 126.49 mm |
| September | 17.1 °C | 28.6 °C | 136.14 mm |
| October | 10.3 °C | 23.4 °C | 87.63 mm |
| November | 4.1 °C | 17.9 °C | 85.34 mm |
| December | 1.3 °C | 13.6 °C | 92.96 mm |
| Annual | 10.3 °C | 22.9 °C | 1202.67 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°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 |